/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/bresenham-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:09:14,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:09:14,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:09:14,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:09:14,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:09:14,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:09:14,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:09:14,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:09:14,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:09:14,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:09:14,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:09:14,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:09:14,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:09:14,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:09:14,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:09:14,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:09:14,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:09:14,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:09:14,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:09:14,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:09:14,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:09:14,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:09:14,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:09:14,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:09:14,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:09:14,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:09:14,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:09:14,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:09:14,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:09:14,276 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:09:14,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:09:14,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:09:14,278 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:09:14,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:09:14,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:09:14,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:09:14,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:09:14,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:09:14,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:09:14,279 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:09:14,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:09:14,280 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:09:14,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:09:14,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:09:14,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:09:14,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:09:14,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:09:14,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:09:14,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:09:14,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:09:14,281 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:09:14,281 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:09:14,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:09:14,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:09:14,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:09:14,507 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:09:14,508 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:09:14,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound1.c [2021-05-06 07:09:14,564 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6de9a4bb5/5f27a896eca0438bb2cb14cf5bb5aa46/FLAGeae1a63fa [2021-05-06 07:09:14,904 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:09:14,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound1.c [2021-05-06 07:09:14,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6de9a4bb5/5f27a896eca0438bb2cb14cf5bb5aa46/FLAGeae1a63fa [2021-05-06 07:09:14,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6de9a4bb5/5f27a896eca0438bb2cb14cf5bb5aa46 [2021-05-06 07:09:14,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:09:14,919 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:09:14,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:09:14,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:09:14,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:09:14,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:09:14" (1/1) ... [2021-05-06 07:09:14,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25061938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:14, skipping insertion in model container [2021-05-06 07:09:14,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:09:14" (1/1) ... [2021-05-06 07:09:14,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:09:14,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:09:15,015 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/bresenham-ll_valuebound1.c[597,610] [2021-05-06 07:09:15,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:09:15,035 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:09:15,046 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/bresenham-ll_valuebound1.c[597,610] [2021-05-06 07:09:15,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:09:15,121 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:09:15,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:15 WrapperNode [2021-05-06 07:09:15,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:09:15,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:09:15,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:09:15,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:09:15,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:15" (1/1) ... [2021-05-06 07:09:15,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:15" (1/1) ... [2021-05-06 07:09:15,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:15" (1/1) ... [2021-05-06 07:09:15,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:15" (1/1) ... [2021-05-06 07:09:15,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:15" (1/1) ... [2021-05-06 07:09:15,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:15" (1/1) ... [2021-05-06 07:09:15,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:15" (1/1) ... [2021-05-06 07:09:15,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:09:15,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:09:15,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:09:15,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:09:15,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:15" (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 07:09:15,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:09:15,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:09:15,225 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:09:15,226 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:09:15,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:09:15,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:09:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:09:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:09:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:09:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:09:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:09:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:09:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:09:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:09:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:09:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:09:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:09:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:09:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:09:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:09:15,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:09:15,456 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 07:09:15,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:09:15 BoogieIcfgContainer [2021-05-06 07:09:15,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:09:15,458 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:09:15,458 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:09:15,459 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:09:15,462 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:09:15" (1/1) ... [2021-05-06 07:09:15,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:09:15 BasicIcfg [2021-05-06 07:09:15,472 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:09:15,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:09:15,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:09:15,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:09:15,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:09:14" (1/4) ... [2021-05-06 07:09:15,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315d08f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:09:15, skipping insertion in model container [2021-05-06 07:09:15,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:15" (2/4) ... [2021-05-06 07:09:15,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315d08f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:09:15, skipping insertion in model container [2021-05-06 07:09:15,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:09:15" (3/4) ... [2021-05-06 07:09:15,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315d08f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:09:15, skipping insertion in model container [2021-05-06 07:09:15,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:09:15" (4/4) ... [2021-05-06 07:09:15,477 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound1.cJordan [2021-05-06 07:09:15,480 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:09:15,483 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:09:15,493 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:09:15,504 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:09:15,505 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:09:15,505 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:09:15,505 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:09:15,505 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:09:15,505 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:09:15,505 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:09:15,505 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:09:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:09:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:09:15,518 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:15,518 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:15,518 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:15,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1563578423, now seen corresponding path program 1 times [2021-05-06 07:09:15,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:15,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942724150] [2021-05-06 07:09:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:15,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:09:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:15,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:09:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:15,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 07:09:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:09:15,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:15,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942724150] [2021-05-06 07:09:15,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942724150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:09:15,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:09:15,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:09:15,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350231805] [2021-05-06 07:09:15,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:09:15,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:15,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:09:15,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:09:15,763 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:09:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:15,849 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-06 07:09:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:09:15,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 07:09:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:15,856 INFO L225 Difference]: With dead ends: 32 [2021-05-06 07:09:15,856 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 07:09:15,858 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:09:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 07:09:15,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 07:09:15,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:09:15,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-06 07:09:15,883 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2021-05-06 07:09:15,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:15,883 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-06 07:09:15,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:09:15,883 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-06 07:09:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:09:15,885 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:15,885 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:15,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:09:15,885 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:15,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:15,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1863481077, now seen corresponding path program 1 times [2021-05-06 07:09:15,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:15,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197921715] [2021-05-06 07:09:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:15,915 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:15,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074075013] [2021-05-06 07:09:15,916 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 07:09:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:16,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:09:16,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:16,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:09:16,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:16,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197921715] [2021-05-06 07:09:16,145 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:16,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074075013] [2021-05-06 07:09:16,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074075013] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:09:16,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:09:16,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:09:16,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211126113] [2021-05-06 07:09:16,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:09:16,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:16,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:09:16,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:09:16,147 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:09:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:16,234 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-06 07:09:16,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:09:16,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 07:09:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:16,235 INFO L225 Difference]: With dead ends: 37 [2021-05-06 07:09:16,235 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:09:16,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:09:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:09:16,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-06 07:09:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:09:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 07:09:16,240 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2021-05-06 07:09:16,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:16,241 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 07:09:16,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:09:16,241 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 07:09:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 07:09:16,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:16,242 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:16,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:09:16,457 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:16,458 INFO L82 PathProgramCache]: Analyzing trace with hash -646008129, now seen corresponding path program 1 times [2021-05-06 07:09:16,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:16,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90007566] [2021-05-06 07:09:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:16,465 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:16,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846491945] [2021-05-06 07:09:16,466 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 07:09:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:16,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 07:09:16,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:16,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:16,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:16,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:16,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:16,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:16,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:16,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:16,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:09:16,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:16,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90007566] [2021-05-06 07:09:16,824 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:16,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846491945] [2021-05-06 07:09:16,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846491945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:09:16,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:09:16,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 07:09:16,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990322265] [2021-05-06 07:09:16,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 07:09:16,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:16,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 07:09:16,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:09:16,826 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:09:16,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:16,975 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-05-06 07:09:16,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:09:16,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-06 07:09:16,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:16,976 INFO L225 Difference]: With dead ends: 48 [2021-05-06 07:09:16,976 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:09:16,976 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:09:16,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:09:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 07:09:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:09:16,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-05-06 07:09:16,979 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2021-05-06 07:09:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:16,980 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-05-06 07:09:16,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:09:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-05-06 07:09:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 07:09:16,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:16,981 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:17,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:17,193 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:17,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:17,193 INFO L82 PathProgramCache]: Analyzing trace with hash 241495552, now seen corresponding path program 1 times [2021-05-06 07:09:17,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:17,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703653462] [2021-05-06 07:09:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:17,208 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:17,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528946306] [2021-05-06 07:09:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:17,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 07:09:17,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:17,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:17,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:17,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:17,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:17,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:09:17,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:17,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703653462] [2021-05-06 07:09:17,463 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:17,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528946306] [2021-05-06 07:09:17,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528946306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:09:17,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:09:17,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 07:09:17,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603601774] [2021-05-06 07:09:17,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 07:09:17,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:17,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 07:09:17,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-06 07:09:17,464 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:09:17,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:17,600 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-05-06 07:09:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 07:09:17,600 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-05-06 07:09:17,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:17,603 INFO L225 Difference]: With dead ends: 46 [2021-05-06 07:09:17,603 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 07:09:17,605 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-06 07:09:17,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 07:09:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2021-05-06 07:09:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:09:17,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-06 07:09:17,617 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2021-05-06 07:09:17,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:17,618 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-06 07:09:17,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:09:17,618 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-06 07:09:17,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 07:09:17,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:17,621 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:17,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:17,834 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:17,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:17,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1661983408, now seen corresponding path program 1 times [2021-05-06 07:09:17,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:17,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852375935] [2021-05-06 07:09:17,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:17,842 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:17,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405314100] [2021-05-06 07:09:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:17,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 07:09:17,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:17,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:17,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:18,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:18,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:18,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:18,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 07:09:18,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:18,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852375935] [2021-05-06 07:09:18,075 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:18,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405314100] [2021-05-06 07:09:18,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405314100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:09:18,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:09:18,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 07:09:18,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052651470] [2021-05-06 07:09:18,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 07:09:18,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:18,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 07:09:18,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:09:18,076 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:09:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:18,283 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-05-06 07:09:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 07:09:18,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-05-06 07:09:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:18,285 INFO L225 Difference]: With dead ends: 51 [2021-05-06 07:09:18,285 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 07:09:18,285 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-06 07:09:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 07:09:18,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-05-06 07:09:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:09:18,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-06 07:09:18,288 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 39 [2021-05-06 07:09:18,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:18,288 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-06 07:09:18,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:09:18,288 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-06 07:09:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 07:09:18,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:18,289 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:18,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:18,506 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:18,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:18,507 INFO L82 PathProgramCache]: Analyzing trace with hash 207688042, now seen corresponding path program 1 times [2021-05-06 07:09:18,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:18,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772064816] [2021-05-06 07:09:18,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:18,516 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:18,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041089993] [2021-05-06 07:09:18,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:18,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 07:09:18,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:18,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:18,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:18,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:18,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:18,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:18,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:18,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:18,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:18,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:18,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 07:09:18,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:18,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772064816] [2021-05-06 07:09:18,769 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:18,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041089993] [2021-05-06 07:09:18,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041089993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:09:18,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:09:18,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:09:18,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131778379] [2021-05-06 07:09:18,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:09:18,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:18,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:09:18,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:09:18,771 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 07:09:18,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:18,821 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-06 07:09:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:09:18,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-06 07:09:18,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:18,822 INFO L225 Difference]: With dead ends: 44 [2021-05-06 07:09:18,823 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 07:09:18,823 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:09:18,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 07:09:18,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 07:09:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:09:18,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-06 07:09:18,829 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 41 [2021-05-06 07:09:18,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:18,829 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-06 07:09:18,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 07:09:18,829 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-06 07:09:18,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 07:09:18,832 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:18,832 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:19,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:19,049 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:19,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:19,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1095191723, now seen corresponding path program 2 times [2021-05-06 07:09:19,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:19,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171747670] [2021-05-06 07:09:19,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:19,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:19,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605999838] [2021-05-06 07:09:19,056 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:19,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:09:19,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:09:19,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 07:09:19,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:19,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 07:09:19,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:19,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171747670] [2021-05-06 07:09:19,448 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:19,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605999838] [2021-05-06 07:09:19,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605999838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:09:19,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:09:19,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 07:09:19,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097709032] [2021-05-06 07:09:19,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 07:09:19,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:19,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 07:09:19,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 07:09:19,450 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 07:09:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:19,603 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-05-06 07:09:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 07:09:19,603 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-06 07:09:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:19,604 INFO L225 Difference]: With dead ends: 47 [2021-05-06 07:09:19,604 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 07:09:19,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-05-06 07:09:19,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 07:09:19,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 07:09:19,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.0) internal successors, (31), 31 states have internal predecessors, (31), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:09:19,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-06 07:09:19,606 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 41 [2021-05-06 07:09:19,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:19,607 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-06 07:09:19,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 07:09:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-06 07:09:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 07:09:19,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:19,607 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:19,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:19,826 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:19,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:19,827 INFO L82 PathProgramCache]: Analyzing trace with hash -642711483, now seen corresponding path program 2 times [2021-05-06 07:09:19,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:19,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756626812] [2021-05-06 07:09:19,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:19,840 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:19,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313693930] [2021-05-06 07:09:19,840 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:19,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:09:19,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:09:19,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 07:09:19,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:19,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:19,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:20,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:21,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:21,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:21,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:21,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:21,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:21,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:21,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:21,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:21,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:21,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:21,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:21,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:21,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:21,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:21,517 WARN L159 QuantifierPusher]: Ignoring assumption.