/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:40:19,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:40:19,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:40:19,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:40:19,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:40:19,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:40:19,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:40:19,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:40:19,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:40:19,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:40:19,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:40:19,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:40:19,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:40:19,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:40:19,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:40:19,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:40:19,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:40:19,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:40:19,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:40:19,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:40:19,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:40:19,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:40:19,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:40:19,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:40:19,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:40:19,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:40:19,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:40:19,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:40:19,286 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:40:19,295 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:40:19,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:40:19,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:40:19,297 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:40:19,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:40:19,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:40:19,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:40:19,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:40:19,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:40:19,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:40:19,298 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:40:19,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:40:19,299 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:40:19,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:40:19,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:40:19,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:40:19,299 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:40:19,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:40:19,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:40:19,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:40:19,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:40:19,301 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:40:19,301 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:40:19,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:40:19,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:40:19,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:40:19,650 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:40:19,651 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:40:19,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2021-05-02 19:40:19,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23710fb5e/ac43fe0e55934d0eaaea776c3fb8da35/FLAG7a937a5bd [2021-05-02 19:40:20,184 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:40:20,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2021-05-02 19:40:20,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23710fb5e/ac43fe0e55934d0eaaea776c3fb8da35/FLAG7a937a5bd [2021-05-02 19:40:20,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23710fb5e/ac43fe0e55934d0eaaea776c3fb8da35 [2021-05-02 19:40:20,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:40:20,220 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:40:20,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:40:20,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:40:20,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:40:20,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:40:20" (1/1) ... [2021-05-02 19:40:20,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53b15404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:20, skipping insertion in model container [2021-05-02 19:40:20,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:40:20" (1/1) ... [2021-05-02 19:40:20,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:40:20,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:40:20,363 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c[596,609] [2021-05-02 19:40:20,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:40:20,407 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:40:20,434 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c[596,609] [2021-05-02 19:40:20,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:40:20,483 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:40:20,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:20 WrapperNode [2021-05-02 19:40:20,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:40:20,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:40:20,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:40:20,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:40:20,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:20" (1/1) ... [2021-05-02 19:40:20,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:20" (1/1) ... [2021-05-02 19:40:20,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:20" (1/1) ... [2021-05-02 19:40:20,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:20" (1/1) ... [2021-05-02 19:40:20,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:20" (1/1) ... [2021-05-02 19:40:20,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:20" (1/1) ... [2021-05-02 19:40:20,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:20" (1/1) ... [2021-05-02 19:40:20,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:40:20,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:40:20,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:40:20,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:40:20,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:20" (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 [2021-05-02 19:40:20,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:40:20,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:40:20,595 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:40:20,596 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:40:20,596 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:40:20,596 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:40:20,596 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:40:20,596 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:40:20,596 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:40:20,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:40:20,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-02 19:40:20,597 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:40:20,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:40:20,597 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:40:20,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:40:20,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:40:20,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:40:20,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:40:20,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:40:20,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:40:20,908 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:40:20,908 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:40:20,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:40:20 BoogieIcfgContainer [2021-05-02 19:40:20,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:40:20,910 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:40:20,910 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:40:20,911 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:40:20,926 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:40:20" (1/1) ... [2021-05-02 19:40:20,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:40:20 BasicIcfg [2021-05-02 19:40:20,954 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:40:20,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:40:20,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:40:20,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:40:20,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:40:20" (1/4) ... [2021-05-02 19:40:20,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee86d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:40:20, skipping insertion in model container [2021-05-02 19:40:20,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:20" (2/4) ... [2021-05-02 19:40:20,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee86d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:40:20, skipping insertion in model container [2021-05-02 19:40:20,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:40:20" (3/4) ... [2021-05-02 19:40:20,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee86d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:40:20, skipping insertion in model container [2021-05-02 19:40:20,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:40:20" (4/4) ... [2021-05-02 19:40:20,960 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound50.cJordan [2021-05-02 19:40:20,967 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:40:20,971 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:40:20,987 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:40:21,010 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:40:21,010 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:40:21,010 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:40:21,010 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:40:21,011 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:40:21,011 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:40:21,011 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:40:21,011 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:40:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 19:40:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:40:21,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:21,038 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:21,038 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:21,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1231486971, now seen corresponding path program 1 times [2021-05-02 19:40:21,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:21,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074473421] [2021-05-02 19:40:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:21,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:40:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:21,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:40:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:40:21,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:21,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074473421] [2021-05-02 19:40:21,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074473421] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:21,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:21,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:40:21,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241395185] [2021-05-02 19:40:21,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:40:21,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:21,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:40:21,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:40:21,306 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:21,424 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-05-02 19:40:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:40:21,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 19:40:21,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:21,432 INFO L225 Difference]: With dead ends: 36 [2021-05-02 19:40:21,432 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 19:40:21,433 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:40:21,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 19:40:21,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 19:40:21,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 19:40:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-05-02 19:40:21,470 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2021-05-02 19:40:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:21,470 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-05-02 19:40:21,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:21,471 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-05-02 19:40:21,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:40:21,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:21,472 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:21,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:40:21,472 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:21,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:21,473 INFO L82 PathProgramCache]: Analyzing trace with hash -574090659, now seen corresponding path program 1 times [2021-05-02 19:40:21,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:21,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230089074] [2021-05-02 19:40:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:21,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:40:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:21,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:40:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:40:21,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:21,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230089074] [2021-05-02 19:40:21,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230089074] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:21,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:21,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:40:21,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472751173] [2021-05-02 19:40:21,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:40:21,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:21,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:40:21,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:40:21,662 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:21,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:21,930 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-02 19:40:21,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:40:21,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 19:40:21,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:21,931 INFO L225 Difference]: With dead ends: 35 [2021-05-02 19:40:21,931 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 19:40:21,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:21,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 19:40:21,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 19:40:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 19:40:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 19:40:21,940 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2021-05-02 19:40:21,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:21,940 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 19:40:21,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:21,941 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 19:40:21,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:40:21,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:21,942 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:21,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:40:21,942 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:21,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:21,943 INFO L82 PathProgramCache]: Analyzing trace with hash 344526146, now seen corresponding path program 1 times [2021-05-02 19:40:21,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:21,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50995634] [2021-05-02 19:40:21,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:21,954 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:21,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977991496] [2021-05-02 19:40:21,954 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 [2021-05-02 19:40:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:22,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:40:22,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:40:22,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:22,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50995634] [2021-05-02 19:40:22,181 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:22,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977991496] [2021-05-02 19:40:22,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977991496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:22,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:22,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:40:22,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849865616] [2021-05-02 19:40:22,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:22,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:22,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:22,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:22,183 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:40:24,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:24,389 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-05-02 19:40:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:40:24,396 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 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 22 [2021-05-02 19:40:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:24,397 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:40:24,397 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 19:40:24,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 19:40:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 19:40:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:40:24,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2021-05-02 19:40:24,409 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 22 [2021-05-02 19:40:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:24,409 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2021-05-02 19:40:24,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:40:24,410 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2021-05-02 19:40:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 19:40:24,410 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:24,411 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:24,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 19:40:24,635 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:24,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:24,636 INFO L82 PathProgramCache]: Analyzing trace with hash 942277242, now seen corresponding path program 1 times [2021-05-02 19:40:24,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:24,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617035805] [2021-05-02 19:40:24,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:24,649 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:24,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130581773] [2021-05-02 19:40:24,650 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 [2021-05-02 19:40:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:24,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:40:24,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:40:24,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:24,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617035805] [2021-05-02 19:40:24,842 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:24,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130581773] [2021-05-02 19:40:24,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130581773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:24,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:24,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:40:24,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672022632] [2021-05-02 19:40:24,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:24,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:24,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:24,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:24,844 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:40:24,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:24,998 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2021-05-02 19:40:24,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:40:24,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-05-02 19:40:24,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:24,999 INFO L225 Difference]: With dead ends: 60 [2021-05-02 19:40:24,999 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 19:40:25,000 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 19:40:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 19:40:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:40:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2021-05-02 19:40:25,007 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 27 [2021-05-02 19:40:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:25,007 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2021-05-02 19:40:25,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:40:25,008 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2021-05-02 19:40:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:40:25,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:25,009 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:25,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:25,225 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:25,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:25,225 INFO L82 PathProgramCache]: Analyzing trace with hash -881201762, now seen corresponding path program 1 times [2021-05-02 19:40:25,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:25,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435810557] [2021-05-02 19:40:25,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:25,244 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:25,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437453571] [2021-05-02 19:40:25,245 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 [2021-05-02 19:40:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:25,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:40:25,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 19:40:25,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:25,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435810557] [2021-05-02 19:40:25,394 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:25,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437453571] [2021-05-02 19:40:25,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437453571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:25,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:25,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:40:25,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709243434] [2021-05-02 19:40:25,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:25,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:25,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:25,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:25,396 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 19:40:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:25,612 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2021-05-02 19:40:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:40:25,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2021-05-02 19:40:25,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:25,614 INFO L225 Difference]: With dead ends: 64 [2021-05-02 19:40:25,614 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 19:40:25,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:25,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 19:40:25,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 19:40:25,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 19:40:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2021-05-02 19:40:25,620 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 32 [2021-05-02 19:40:25,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:25,620 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2021-05-02 19:40:25,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 19:40:25,620 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2021-05-02 19:40:25,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 19:40:25,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:25,622 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:25,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:25,845 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:25,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:25,845 INFO L82 PathProgramCache]: Analyzing trace with hash 72164327, now seen corresponding path program 1 times [2021-05-02 19:40:25,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:25,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500730241] [2021-05-02 19:40:25,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:25,854 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:25,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869788726] [2021-05-02 19:40:25,855 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 [2021-05-02 19:40:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:25,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 19:40:25,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 19:40:26,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:26,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500730241] [2021-05-02 19:40:26,091 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:26,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869788726] [2021-05-02 19:40:26,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869788726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:26,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:26,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:40:26,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936042547] [2021-05-02 19:40:26,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:40:26,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:26,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:40:26,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:40:26,093 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 19:40:26,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:26,383 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2021-05-02 19:40:26,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:40:26,383 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2021-05-02 19:40:26,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:26,384 INFO L225 Difference]: With dead ends: 79 [2021-05-02 19:40:26,384 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 19:40:26,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:40:26,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 19:40:26,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-02 19:40:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 40 states have internal predecessors, (41), 29 states have call successors, (29), 11 states have call predecessors, (29), 10 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 19:40:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-05-02 19:40:26,392 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 49 [2021-05-02 19:40:26,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:26,392 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-05-02 19:40:26,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 19:40:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-05-02 19:40:26,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 19:40:26,394 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:26,394 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-02 19:40:26,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:26,613 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:26,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:26,613 INFO L82 PathProgramCache]: Analyzing trace with hash 655575797, now seen corresponding path program 2 times [2021-05-02 19:40:26,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:26,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575870193] [2021-05-02 19:40:26,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:26,632 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:26,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116376291] [2021-05-02 19:40:26,632 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 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 [2021-05-02 19:40:26,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:40:26,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:26,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:40:26,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 19:40:26,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:26,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575870193] [2021-05-02 19:40:26,858 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:26,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116376291] [2021-05-02 19:40:26,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116376291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:26,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:26,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:40:26,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91204861] [2021-05-02 19:40:26,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:40:26,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:26,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:40:26,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:40:26,860 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 19:40:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:27,083 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2021-05-02 19:40:27,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:40:27,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 54 [2021-05-02 19:40:27,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:27,084 INFO L225 Difference]: With dead ends: 83 [2021-05-02 19:40:27,084 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 19:40:27,084 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:40:27,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 19:40:27,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 19:40:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 43 states have internal predecessors, (44), 28 states have call successors, (28), 12 states have call predecessors, (28), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 19:40:27,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2021-05-02 19:40:27,091 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 54 [2021-05-02 19:40:27,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:27,091 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2021-05-02 19:40:27,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 19:40:27,091 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2021-05-02 19:40:27,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 19:40:27,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:27,093 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 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] [2021-05-02 19:40:27,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 19:40:27,301 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1897273453, now seen corresponding path program 1 times [2021-05-02 19:40:27,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:27,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022813957] [2021-05-02 19:40:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:27,311 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:27,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769446798] [2021-05-02 19:40:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 19:40:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:27,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 19:40:27,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:27,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-02 19:40:27,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:27,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022813957] [2021-05-02 19:40:27,751 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:27,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769446798] [2021-05-02 19:40:27,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769446798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:27,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:27,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:40:27,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836950768] [2021-05-02 19:40:27,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:40:27,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:27,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:40:27,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:27,756 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 19:40:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:27,975 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2021-05-02 19:40:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:40:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2021-05-02 19:40:27,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:27,982 INFO L225 Difference]: With dead ends: 89 [2021-05-02 19:40:27,982 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 19:40:27,983 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:40:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 19:40:27,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-02 19:40:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 49 states have internal predecessors, (50), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 19:40:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2021-05-02 19:40:28,003 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 75 [2021-05-02 19:40:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:28,003 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2021-05-02 19:40:28,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 19:40:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2021-05-02 19:40:28,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 19:40:28,005 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:28,005 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 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] [2021-05-02 19:40:28,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:28,229 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:28,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:28,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2023420382, now seen corresponding path program 3 times [2021-05-02 19:40:28,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:28,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548760334] [2021-05-02 19:40:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:28,241 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:28,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196351606] [2021-05-02 19:40:28,242 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 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 [2021-05-02 19:40:28,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:40:28,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:28,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 19:40:28,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:28,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:28,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 51 proven. 14 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 19:40:28,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:28,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548760334] [2021-05-02 19:40:28,528 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:28,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196351606] [2021-05-02 19:40:28,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196351606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:28,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:28,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:40:28,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784219700] [2021-05-02 19:40:28,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:40:28,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:28,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:40:28,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:28,530 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 19:40:28,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:28,807 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2021-05-02 19:40:28,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:40:28,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2021-05-02 19:40:28,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:28,808 INFO L225 Difference]: With dead ends: 110 [2021-05-02 19:40:28,808 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 19:40:28,809 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:40:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 19:40:28,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 19:40:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 58 states have internal predecessors, (59), 38 states have call successors, (38), 16 states have call predecessors, (38), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 19:40:28,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-05-02 19:40:28,823 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 76 [2021-05-02 19:40:28,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:28,823 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-05-02 19:40:28,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 19:40:28,823 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-05-02 19:40:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 19:40:28,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:28,829 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 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, 1] [2021-05-02 19:40:29,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 19:40:29,030 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:29,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:29,030 INFO L82 PathProgramCache]: Analyzing trace with hash -994112719, now seen corresponding path program 1 times [2021-05-02 19:40:29,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:29,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291322671] [2021-05-02 19:40:29,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:29,039 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:29,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052240641] [2021-05-02 19:40:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:29,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 19:40:29,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:29,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-02 19:40:29,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:29,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291322671] [2021-05-02 19:40:29,449 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:29,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052240641] [2021-05-02 19:40:29,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052240641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:29,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:29,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:40:29,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876707605] [2021-05-02 19:40:29,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:40:29,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:29,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:40:29,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:29,450 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 19:40:29,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:29,628 INFO L93 Difference]: Finished difference Result 113 states and 135 transitions. [2021-05-02 19:40:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:40:29,629 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 80 [2021-05-02 19:40:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:29,631 INFO L225 Difference]: With dead ends: 113 [2021-05-02 19:40:29,631 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 19:40:29,631 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:40:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 19:40:29,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-05-02 19:40:29,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 61 states have internal predecessors, (62), 38 states have call successors, (38), 17 states have call predecessors, (38), 16 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 19:40:29,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2021-05-02 19:40:29,637 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 80 [2021-05-02 19:40:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:29,638 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2021-05-02 19:40:29,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 19:40:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2021-05-02 19:40:29,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 19:40:29,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:29,639 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 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] [2021-05-02 19:40:29,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 19:40:29,849 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:29,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:29,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1391751782, now seen corresponding path program 4 times [2021-05-02 19:40:29,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:29,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474077161] [2021-05-02 19:40:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:29,857 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:29,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313438847] [2021-05-02 19:40:29,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:29,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:40:29,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:29,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 19:40:29,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-05-02 19:40:30,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:30,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474077161] [2021-05-02 19:40:30,134 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:30,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313438847] [2021-05-02 19:40:30,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313438847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:30,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:30,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:40:30,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628094224] [2021-05-02 19:40:30,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:40:30,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:30,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:40:30,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:30,136 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 19:40:30,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:30,479 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2021-05-02 19:40:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:40:30,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 81 [2021-05-02 19:40:30,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:30,481 INFO L225 Difference]: With dead ends: 122 [2021-05-02 19:40:30,481 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 19:40:30,481 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:40:30,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 19:40:30,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 19:40:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 60 states have internal predecessors, (61), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 19:40:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-05-02 19:40:30,487 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 81 [2021-05-02 19:40:30,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:30,487 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-05-02 19:40:30,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 19:40:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-05-02 19:40:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 19:40:30,488 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:30,488 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:30,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:30,705 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:30,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:30,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1552787842, now seen corresponding path program 5 times [2021-05-02 19:40:30,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:30,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543848699] [2021-05-02 19:40:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:30,712 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:30,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196676744] [2021-05-02 19:40:30,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:30,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 19:40:30,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:30,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 19:40:30,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 83 proven. 50 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-05-02 19:40:31,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:31,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543848699] [2021-05-02 19:40:31,030 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:31,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196676744] [2021-05-02 19:40:31,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196676744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:31,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:31,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:40:31,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233510958] [2021-05-02 19:40:31,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:40:31,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:31,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:40:31,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:31,031 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 19:40:31,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:31,326 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2021-05-02 19:40:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:40:31,326 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 86 [2021-05-02 19:40:31,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:31,327 INFO L225 Difference]: With dead ends: 114 [2021-05-02 19:40:31,327 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 19:40:31,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:40:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 19:40:31,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 19:40:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 19:40:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2021-05-02 19:40:31,333 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 86 [2021-05-02 19:40:31,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:31,334 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2021-05-02 19:40:31,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 19:40:31,334 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2021-05-02 19:40:31,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 19:40:31,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:31,335 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:31,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:31,549 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:31,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:31,550 INFO L82 PathProgramCache]: Analyzing trace with hash 574631438, now seen corresponding path program 2 times [2021-05-02 19:40:31,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:31,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578501321] [2021-05-02 19:40:31,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:31,557 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:31,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286020477] [2021-05-02 19:40:31,558 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:31,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:40:31,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 19:40:31,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:31,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 46 proven. 52 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-05-02 19:40:31,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:31,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578501321] [2021-05-02 19:40:31,989 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:31,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286020477] [2021-05-02 19:40:31,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286020477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:31,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:31,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:40:31,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667667022] [2021-05-02 19:40:31,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:40:31,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:31,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:40:31,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:31,991 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-02 19:40:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:32,281 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2021-05-02 19:40:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:40:32,282 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2021-05-02 19:40:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:32,283 INFO L225 Difference]: With dead ends: 115 [2021-05-02 19:40:32,283 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 19:40:32,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:40:32,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 19:40:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-05-02 19:40:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 64 states have (on average 1.046875) internal successors, (67), 66 states have internal predecessors, (67), 32 states have call successors, (32), 19 states have call predecessors, (32), 18 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 19:40:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2021-05-02 19:40:32,288 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 102 [2021-05-02 19:40:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:32,289 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2021-05-02 19:40:32,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-02 19:40:32,289 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2021-05-02 19:40:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 19:40:32,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:32,290 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:32,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 19:40:32,501 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:32,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:32,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1591187207, now seen corresponding path program 6 times [2021-05-02 19:40:32,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:32,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68836192] [2021-05-02 19:40:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:32,507 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:32,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386335186] [2021-05-02 19:40:32,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:32,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 19:40:32,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:32,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 19:40:32,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:32,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:32,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:32,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:32,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:32,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:32,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:32,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:32,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:32,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:32,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:32,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:32,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:32,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:32,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-05-02 19:40:32,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:32,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68836192] [2021-05-02 19:40:32,919 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:32,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386335186] [2021-05-02 19:40:32,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386335186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:32,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:32,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:40:32,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197556420] [2021-05-02 19:40:32,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:40:32,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:32,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:40:32,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:40:32,921 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 19:40:39,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:39,432 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2021-05-02 19:40:39,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:40:39,432 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2021-05-02 19:40:39,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:39,433 INFO L225 Difference]: With dead ends: 119 [2021-05-02 19:40:39,433 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 19:40:39,433 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:40:39,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 19:40:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-02 19:40:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 67 states have (on average 1.044776119402985) internal successors, (70), 69 states have internal predecessors, (70), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 19:40:39,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2021-05-02 19:40:39,438 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 103 [2021-05-02 19:40:39,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:39,438 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2021-05-02 19:40:39,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 19:40:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2021-05-02 19:40:39,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 19:40:39,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:39,440 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:39,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:39,653 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:39,653 INFO L82 PathProgramCache]: Analyzing trace with hash 474519958, now seen corresponding path program 2 times [2021-05-02 19:40:39,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:39,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48133777] [2021-05-02 19:40:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:39,660 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:39,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707867083] [2021-05-02 19:40:39,670 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:39,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:40:39,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:39,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 19:40:39,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:39,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 48 proven. 55 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 19:40:40,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:40,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48133777] [2021-05-02 19:40:40,013 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:40,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707867083] [2021-05-02 19:40:40,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707867083] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:40,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:40,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:40:40,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158223815] [2021-05-02 19:40:40,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:40:40,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:40,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:40:40,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:40,016 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 19:40:40,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:40,456 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2021-05-02 19:40:40,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:40:40,457 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 107 [2021-05-02 19:40:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:40,457 INFO L225 Difference]: With dead ends: 123 [2021-05-02 19:40:40,458 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 19:40:40,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:40:40,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 19:40:40,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 19:40:40,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 29 states have call successors, (29), 19 states have call predecessors, (29), 18 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 19:40:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2021-05-02 19:40:40,464 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 107 [2021-05-02 19:40:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:40,464 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2021-05-02 19:40:40,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 19:40:40,464 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2021-05-02 19:40:40,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 19:40:40,465 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:40,465 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:40,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-05-02 19:40:40,677 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:40,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:40,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1186188245, now seen corresponding path program 7 times [2021-05-02 19:40:40,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:40,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683440815] [2021-05-02 19:40:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:40,684 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:40,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470072350] [2021-05-02 19:40:40,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:40,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 19:40:40,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 48 proven. 67 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 19:40:41,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:41,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683440815] [2021-05-02 19:40:41,010 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:41,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470072350] [2021-05-02 19:40:41,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470072350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:41,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:41,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:40:41,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766949506] [2021-05-02 19:40:41,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:40:41,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:41,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:40:41,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:41,012 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 19:40:41,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:41,350 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2021-05-02 19:40:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:40:41,353 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 108 [2021-05-02 19:40:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:41,357 INFO L225 Difference]: With dead ends: 129 [2021-05-02 19:40:41,357 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 19:40:41,357 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:40:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 19:40:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2021-05-02 19:40:41,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 70 states have internal predecessors, (70), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 19:40:41,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2021-05-02 19:40:41,366 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 108 [2021-05-02 19:40:41,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:41,367 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2021-05-02 19:40:41,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 19:40:41,367 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2021-05-02 19:40:41,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 19:40:41,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:41,368 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:41,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:41,585 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:41,585 INFO L82 PathProgramCache]: Analyzing trace with hash 65979683, now seen corresponding path program 8 times [2021-05-02 19:40:41,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:41,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454304677] [2021-05-02 19:40:41,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:41,592 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:41,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641093728] [2021-05-02 19:40:41,593 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:41,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:40:41,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:41,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 19:40:41,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 50 proven. 73 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-05-02 19:40:41,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:41,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454304677] [2021-05-02 19:40:41,899 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:41,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641093728] [2021-05-02 19:40:41,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641093728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:41,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:41,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:40:41,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656527810] [2021-05-02 19:40:41,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:40:41,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:41,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:40:41,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:41,903 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-05-02 19:40:42,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:42,282 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2021-05-02 19:40:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:40:42,283 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 113 [2021-05-02 19:40:42,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:42,284 INFO L225 Difference]: With dead ends: 137 [2021-05-02 19:40:42,284 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 19:40:42,285 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:40:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 19:40:42,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-05-02 19:40:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 75 states have (on average 1.04) internal successors, (78), 77 states have internal predecessors, (78), 37 states have call successors, (37), 22 states have call predecessors, (37), 21 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 19:40:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 149 transitions. [2021-05-02 19:40:42,291 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 149 transitions. Word has length 113 [2021-05-02 19:40:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:42,291 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 149 transitions. [2021-05-02 19:40:42,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-05-02 19:40:42,292 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 149 transitions. [2021-05-02 19:40:42,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 19:40:42,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:42,295 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:42,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 19:40:42,518 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:42,519 INFO L82 PathProgramCache]: Analyzing trace with hash 94155443, now seen corresponding path program 3 times [2021-05-02 19:40:42,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:42,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644644711] [2021-05-02 19:40:42,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:42,523 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:42,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429489353] [2021-05-02 19:40:42,524 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:44,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:40:44,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:44,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 19:40:44,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:44,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,954 WARN L205 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-05-02 19:40:47,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:48,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 162 proven. 17 refuted. 0 times theorem prover too weak. 745 trivial. 0 not checked. [2021-05-02 19:40:49,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:49,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644644711] [2021-05-02 19:40:49,193 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:49,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429489353] [2021-05-02 19:40:49,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429489353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:49,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:49,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 19:40:49,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054179721] [2021-05-02 19:40:49,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 19:40:49,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:49,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 19:40:49,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:40:49,195 INFO L87 Difference]: Start difference. First operand 134 states and 149 transitions. Second operand has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 19:40:59,051 WARN L205 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-05-02 19:41:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:05,484 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2021-05-02 19:41:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:41:05,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 129 [2021-05-02 19:41:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:05,486 INFO L225 Difference]: With dead ends: 138 [2021-05-02 19:41:05,486 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 19:41:05,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 10605.2ms TimeCoverageRelationStatistics Valid=54, Invalid=216, Unknown=2, NotChecked=0, Total=272 [2021-05-02 19:41:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 19:41:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-05-02 19:41:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 80 states have internal predecessors, (81), 37 states have call successors, (37), 23 states have call predecessors, (37), 22 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 19:41:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2021-05-02 19:41:05,491 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 129 [2021-05-02 19:41:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:05,491 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2021-05-02 19:41:05,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 19:41:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2021-05-02 19:41:05,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-02 19:41:05,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:05,505 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:41:05,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:05,714 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:05,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:05,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1269707793, now seen corresponding path program 3 times [2021-05-02 19:41:05,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:05,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715548718] [2021-05-02 19:41:05,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:05,725 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:05,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831773207] [2021-05-02 19:41:05,725 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:07,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 19:41:07,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:07,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 19:41:07,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:07,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:07,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:08,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:17,904 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 19:41:17,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:17,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,209 WARN L205 SmtUtils]: Spent 10.12 s on a formula simplification that was a NOOP. DAG size: 47 [2021-05-02 19:41:30,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 276 proven. 59 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2021-05-02 19:41:30,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:30,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715548718] [2021-05-02 19:41:30,906 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:30,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831773207] [2021-05-02 19:41:30,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831773207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:30,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:30,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:41:30,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532044011] [2021-05-02 19:41:30,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:41:30,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:30,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:41:30,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=186, Unknown=2, NotChecked=0, Total=240 [2021-05-02 19:41:30,908 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand has 16 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 19:41:42,670 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 41 [2021-05-02 19:41:59,997 WARN L205 SmtUtils]: Spent 12.38 s on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-05-02 19:42:06,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:42:06,069 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2021-05-02 19:42:06,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:42:06,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) Word has length 134 [2021-05-02 19:42:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:42:06,071 INFO L225 Difference]: With dead ends: 154 [2021-05-02 19:42:06,071 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 19:42:06,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 41288.6ms TimeCoverageRelationStatistics Valid=87, Invalid=329, Unknown=4, NotChecked=0, Total=420 [2021-05-02 19:42:06,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 19:42:06,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-02 19:42:06,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 91 states have internal predecessors, (92), 32 states have call successors, (32), 27 states have call predecessors, (32), 26 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 19:42:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2021-05-02 19:42:06,076 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 134 [2021-05-02 19:42:06,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:42:06,076 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2021-05-02 19:42:06,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 19:42:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2021-05-02 19:42:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 19:42:06,077 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:42:06,077 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:42:06,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 19:42:06,284 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:42:06,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:42:06,284 INFO L82 PathProgramCache]: Analyzing trace with hash 67207354, now seen corresponding path program 9 times [2021-05-02 19:42:06,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:42:06,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380346908] [2021-05-02 19:42:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:42:06,291 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:42:06,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077648102] [2021-05-02 19:42:06,291 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:42:06,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 19:42:06,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:42:06,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 19:42:06,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:42:06,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:06,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:06,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:06,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:06,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:06,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:06,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:06,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:06,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:06,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:06,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 231 proven. 6 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2021-05-02 19:42:06,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:42:06,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380346908] [2021-05-02 19:42:06,853 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:42:06,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077648102] [2021-05-02 19:42:06,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077648102] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:42:06,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:42:06,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:42:06,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467396755] [2021-05-02 19:42:06,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:42:06,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:42:06,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:42:06,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:42:06,855 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 19:42:11,975 WARN L205 SmtUtils]: Spent 5.00 s on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 19:43:34,974 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 19:43:46,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:46,394 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2021-05-02 19:43:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:43:46,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 135 [2021-05-02 19:43:46,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:46,396 INFO L225 Difference]: With dead ends: 153 [2021-05-02 19:43:46,396 INFO L226 Difference]: Without dead ends: 151 [2021-05-02 19:43:46,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 7646.2ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-02 19:43:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-02 19:43:46,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-02 19:43:46,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 32 states have call successors, (32), 28 states have call predecessors, (32), 26 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 19:43:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2021-05-02 19:43:46,400 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 135 [2021-05-02 19:43:46,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:46,401 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2021-05-02 19:43:46,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 19:43:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2021-05-02 19:43:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-02 19:43:46,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:46,402 INFO L523 BasicCegarLoop]: trace histogram [29, 28, 28, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:43:46,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 19:43:46,606 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:46,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:46,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2097040149, now seen corresponding path program 1 times [2021-05-02 19:43:46,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:46,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120275154] [2021-05-02 19:43:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:46,613 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:46,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404969251] [2021-05-02 19:43:46,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:43:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:43:46,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 19:43:46,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:43:47,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 209 proven. 142 refuted. 0 times theorem prover too weak. 1287 trivial. 0 not checked. [2021-05-02 19:43:47,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:47,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120275154] [2021-05-02 19:43:47,171 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:43:47,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404969251] [2021-05-02 19:43:47,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404969251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:43:47,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:43:47,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:43:47,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236587565] [2021-05-02 19:43:47,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:43:47,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:47,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:43:47,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:43:47,172 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2021-05-02 19:43:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:47,640 INFO L93 Difference]: Finished difference Result 172 states and 182 transitions. [2021-05-02 19:43:47,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:43:47,641 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) Word has length 166 [2021-05-02 19:43:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:47,642 INFO L225 Difference]: With dead ends: 172 [2021-05-02 19:43:47,642 INFO L226 Difference]: Without dead ends: 166 [2021-05-02 19:43:47,642 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:43:47,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-02 19:43:47,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-05-02 19:43:47,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 37 states have call successors, (37), 30 states have call predecessors, (37), 28 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 19:43:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 173 transitions. [2021-05-02 19:43:47,647 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 173 transitions. Word has length 166 [2021-05-02 19:43:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:47,647 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 173 transitions. [2021-05-02 19:43:47,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2021-05-02 19:43:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 173 transitions. [2021-05-02 19:43:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-05-02 19:43:47,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:47,649 INFO L523 BasicCegarLoop]: trace histogram [34, 33, 33, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:43:47,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 19:43:47,861 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1554420112, now seen corresponding path program 2 times [2021-05-02 19:43:47,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:47,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072330964] [2021-05-02 19:43:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:47,867 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:47,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801411415] [2021-05-02 19:43:47,867 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:43:48,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:43:48,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:43:48,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-02 19:43:48,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:43:48,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:48,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:53,924 WARN L205 SmtUtils]: Spent 5.38 s on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-05-02 19:43:53,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:53,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:53,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:53,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:53,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:43:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 169 proven. 188 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2021-05-02 19:43:54,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:43:54,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072330964] [2021-05-02 19:43:54,016 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:43:54,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801411415] [2021-05-02 19:43:54,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801411415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:43:54,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:43:54,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:43:54,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639566981] [2021-05-02 19:43:54,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:43:54,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:43:54,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:43:54,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:43:54,017 INFO L87 Difference]: Start difference. First operand 166 states and 173 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2021-05-02 19:43:55,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:43:55,283 INFO L93 Difference]: Finished difference Result 203 states and 212 transitions. [2021-05-02 19:43:55,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:43:55,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 193 [2021-05-02 19:43:55,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:43:55,285 INFO L225 Difference]: With dead ends: 203 [2021-05-02 19:43:55,285 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 19:43:55,285 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 5645.8ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:43:55,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 19:43:55,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-05-02 19:43:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 117 states have internal predecessors, (118), 42 states have call successors, (42), 35 states have call predecessors, (42), 33 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 19:43:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 200 transitions. [2021-05-02 19:43:55,290 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 200 transitions. Word has length 193 [2021-05-02 19:43:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:43:55,290 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 200 transitions. [2021-05-02 19:43:55,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2021-05-02 19:43:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 200 transitions. [2021-05-02 19:43:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-05-02 19:43:55,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:43:55,292 INFO L523 BasicCegarLoop]: trace histogram [39, 38, 38, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:43:55,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-02 19:43:55,509 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:43:55,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:43:55,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1972499915, now seen corresponding path program 3 times [2021-05-02 19:43:55,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:43:55,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955744625] [2021-05-02 19:43:55,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:43:55,517 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:43:55,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792502136] [2021-05-02 19:43:55,517 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:44:20,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 19:44:20,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:44:20,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-02 19:44:20,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:44:20,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:20,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:27,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:27,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:31,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:40,268 WARN L205 SmtUtils]: Spent 6.09 s on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-05-02 19:44:40,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:40,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:40,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:44:40,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,488 WARN L205 SmtUtils]: Spent 28.48 s on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-05-02 19:45:16,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:45:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 706 proven. 99 refuted. 3 times theorem prover too weak. 2227 trivial. 0 not checked. [2021-05-02 19:45:16,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:45:16,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955744625] [2021-05-02 19:45:16,776 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:45:16,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792502136] [2021-05-02 19:45:16,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792502136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:45:16,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:45:16,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:45:16,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616500175] [2021-05-02 19:45:16,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:45:16,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:45:16,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:45:16,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=192, Unknown=8, NotChecked=0, Total=240 [2021-05-02 19:45:16,777 INFO L87 Difference]: Start difference. First operand 193 states and 200 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2021-05-02 19:46:06,245 WARN L205 SmtUtils]: Spent 49.39 s on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2021-05-02 19:46:32,796 WARN L205 SmtUtils]: Spent 6.11 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 19:47:05,915 WARN L205 SmtUtils]: Spent 18.81 s on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-05-02 19:47:51,019 WARN L205 SmtUtils]: Spent 24.62 s on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-05-02 19:48:36,259 WARN L205 SmtUtils]: Spent 30.42 s on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-05-02 19:48:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:48:40,540 INFO L93 Difference]: Finished difference Result 191 states and 198 transitions. [2021-05-02 19:48:40,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:48:40,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 220 [2021-05-02 19:48:40,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:48:40,550 INFO L225 Difference]: With dead ends: 191 [2021-05-02 19:48:40,550 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:48:40,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 206969.2ms TimeCoverageRelationStatistics Valid=105, Invalid=428, Unknown=19, NotChecked=0, Total=552 [2021-05-02 19:48:40,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:48:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:48:40,550 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) [2021-05-02 19:48:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:48:40,550 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 220 [2021-05-02 19:48:40,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:48:40,551 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:48:40,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2021-05-02 19:48:40,551 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:48:40,551 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:48:40,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-02 19:48:40,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:48:40 BasicIcfg [2021-05-02 19:48:40,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:48:40,756 INFO L168 Benchmark]: Toolchain (without parser) took 500536.89 ms. Allocated memory was 215.0 MB in the beginning and 267.4 MB in the end (delta: 52.4 MB). Free memory was 179.4 MB in the beginning and 243.4 MB in the end (delta: -64.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:48:40,756 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 215.0 MB. Free memory is still 196.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:48:40,756 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.12 ms. Allocated memory is still 215.0 MB. Free memory was 179.2 MB in the beginning and 196.7 MB in the end (delta: -17.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:48:40,756 INFO L168 Benchmark]: Boogie Preprocessor took 47.96 ms. Allocated memory is still 215.0 MB. Free memory was 196.7 MB in the beginning and 195.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:48:40,756 INFO L168 Benchmark]: RCFGBuilder took 376.38 ms. Allocated memory is still 215.0 MB. Free memory was 195.3 MB in the beginning and 179.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:48:40,756 INFO L168 Benchmark]: IcfgTransformer took 43.53 ms. Allocated memory is still 215.0 MB. Free memory was 179.0 MB in the beginning and 177.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:48:40,756 INFO L168 Benchmark]: TraceAbstraction took 499800.31 ms. Allocated memory was 215.0 MB in the beginning and 267.4 MB in the end (delta: 52.4 MB). Free memory was 176.9 MB in the beginning and 243.4 MB in the end (delta: -66.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:48:40,757 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 215.0 MB. Free memory is still 196.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 263.12 ms. Allocated memory is still 215.0 MB. Free memory was 179.2 MB in the beginning and 196.7 MB in the end (delta: -17.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.96 ms. Allocated memory is still 215.0 MB. Free memory was 196.7 MB in the beginning and 195.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 376.38 ms. Allocated memory is still 215.0 MB. Free memory was 195.3 MB in the beginning and 179.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 43.53 ms. Allocated memory is still 215.0 MB. Free memory was 179.0 MB in the beginning and 177.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 499800.31 ms. Allocated memory was 215.0 MB in the beginning and 267.4 MB in the end (delta: 52.4 MB). Free memory was 176.9 MB in the beginning and 243.4 MB in the end (delta: -66.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 499743.8ms, OverallIterations: 23, TraceHistogramMax: 39, EmptinessCheckTime: 54.8ms, AutomataDifference: 369340.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 804 SDtfs, 342 SDslu, 4411 SDs, 0 SdLazy, 5698 SolverSat, 591 SolverUnsat, 50 SolverUnknown, 0 SolverNotchecked, 180699.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2160 GetRequests, 1891 SyntacticMatches, 10 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 273887.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=193occurred in iteration=22, InterpolantAutomatonStates: 223, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 167.7ms AutomataMinimizationTime, 23 MinimizatonAttempts, 14 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 207.4ms SsaConstructionTime, 29525.2ms SatisfiabilityAnalysisTime, 95021.5ms InterpolantComputationTime, 2126 NumberOfCodeBlocks, 1642 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 2103 ConstructedInterpolants, 0 QuantifiedInterpolants, 10100 SizeOfPredicates, 108 NumberOfNonLiveVariables, 4603 ConjunctsInSsa, 745 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 13650/14547 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! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...