/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/prodbin-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:51:56,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:51:56,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:51:56,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:51:56,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:51:56,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:51:56,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:51:56,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:51:56,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:51:56,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:51:56,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:51:56,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:51:56,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:51:56,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:51:56,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:51:56,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:51:56,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:51:56,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:51:56,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:51:56,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:51:56,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:51:56,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:51:56,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:51:56,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:51:56,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:51:56,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:51:56,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:51:56,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:51:56,353 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:51:56,382 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:51:56,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:51:56,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:51:56,385 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:51:56,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:51:56,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:51:56,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:51:56,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:51:56,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:51:56,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:51:56,386 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:51:56,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:51:56,387 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:51:56,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:51:56,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:51:56,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:51:56,387 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:51:56,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:51:56,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:51:56,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:51:56,388 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:51:56,389 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:51:56,389 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:51:56,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:51:57,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:51:57,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:51:57,007 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:51:57,015 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:51:57,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2021-05-02 21:51:57,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e0b93567/d9d3c188bc4a46a484cbf72bcb92e827/FLAG8dc418915 [2021-05-02 21:51:57,883 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:51:57,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2021-05-02 21:51:57,905 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e0b93567/d9d3c188bc4a46a484cbf72bcb92e827/FLAG8dc418915 [2021-05-02 21:51:57,937 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e0b93567/d9d3c188bc4a46a484cbf72bcb92e827 [2021-05-02 21:51:57,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:51:57,941 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:51:57,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:51:57,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:51:57,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:51:57,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:51:57" (1/1) ... [2021-05-02 21:51:57,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@537a1add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:57, skipping insertion in model container [2021-05-02 21:51:57,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:51:57" (1/1) ... [2021-05-02 21:51:57,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:51:57,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:51:58,203 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/prodbin-ll_unwindbound10.c[537,550] [2021-05-02 21:51:58,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:51:58,255 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:51:58,347 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/prodbin-ll_unwindbound10.c[537,550] [2021-05-02 21:51:58,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:51:58,381 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:51:58,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:58 WrapperNode [2021-05-02 21:51:58,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:51:58,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:51:58,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:51:58,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:51:58,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:58" (1/1) ... [2021-05-02 21:51:58,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:58" (1/1) ... [2021-05-02 21:51:58,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:58" (1/1) ... [2021-05-02 21:51:58,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:58" (1/1) ... [2021-05-02 21:51:58,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:58" (1/1) ... [2021-05-02 21:51:58,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:58" (1/1) ... [2021-05-02 21:51:58,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:58" (1/1) ... [2021-05-02 21:51:58,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:51:58,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:51:58,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:51:58,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:51:58,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:58" (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 21:51:58,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:51:58,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:51:58,615 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:51:58,616 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:51:58,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:51:58,623 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:51:58,623 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:51:58,623 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:51:58,623 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:51:58,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:51:58,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 21:51:58,624 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:51:58,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:51:58,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:51:58,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:51:58,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:51:58,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:51:58,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:51:58,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:51:58,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:51:59,068 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:51:59,068 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 21:51:59,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:51:59 BoogieIcfgContainer [2021-05-02 21:51:59,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:51:59,070 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:51:59,070 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:51:59,071 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:51:59,093 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:51:59" (1/1) ... [2021-05-02 21:51:59,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:51:59 BasicIcfg [2021-05-02 21:51:59,132 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:51:59,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:51:59,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:51:59,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:51:59,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:51:57" (1/4) ... [2021-05-02 21:51:59,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d95d28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:51:59, skipping insertion in model container [2021-05-02 21:51:59,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:58" (2/4) ... [2021-05-02 21:51:59,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d95d28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:51:59, skipping insertion in model container [2021-05-02 21:51:59,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:51:59" (3/4) ... [2021-05-02 21:51:59,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d95d28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:51:59, skipping insertion in model container [2021-05-02 21:51:59,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:51:59" (4/4) ... [2021-05-02 21:51:59,151 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound10.cJordan [2021-05-02 21:51:59,155 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:51:59,175 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:51:59,189 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:51:59,243 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:51:59,244 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:51:59,244 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:51:59,244 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:51:59,244 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:51:59,244 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:51:59,244 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:51:59,244 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:51:59,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:51:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 21:51:59,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:51:59,279 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 21:51:59,280 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:51:59,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:51:59,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2021-05-02 21:51:59,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:51:59,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820119463] [2021-05-02 21:51:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:51:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:51:59,726 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 21:51:59,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:51:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:51:59,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:51:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:51:59,802 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 21:51:59,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:51:59,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820119463] [2021-05-02 21:51:59,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820119463] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:51:59,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:51:59,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:51:59,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193902317] [2021-05-02 21:51:59,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:51:59,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:51:59,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:51:59,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:51:59,838 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:52:00,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:00,016 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-02 21:52:00,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:52:00,018 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), 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 21:52:00,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:00,025 INFO L225 Difference]: With dead ends: 31 [2021-05-02 21:52:00,025 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 21:52:00,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:52:00,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 21:52:00,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 21:52:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:52:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 21:52:00,088 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-02 21:52:00,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:00,088 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 21:52:00,088 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), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:52:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 21:52:00,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:52:00,089 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:00,090 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:52:00,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:52:00,090 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:00,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:00,091 INFO L82 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2021-05-02 21:52:00,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:00,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762233582] [2021-05-02 21:52:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:00,135 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:00,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734985541] [2021-05-02 21:52:00,135 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 21:52:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:00,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 21:52:00,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:00,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:00,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:00,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:00,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:00,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:00,632 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 21:52:00,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:00,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762233582] [2021-05-02 21:52:00,634 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:00,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734985541] [2021-05-02 21:52:00,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734985541] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:52:00,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:52:00,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 21:52:00,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079520798] [2021-05-02 21:52:00,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 21:52:00,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:00,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 21:52:00,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:52:00,645 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 21:52:00,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:00,672 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-05-02 21:52:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 21:52:00,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 21:52:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:00,674 INFO L225 Difference]: With dead ends: 27 [2021-05-02 21:52:00,675 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 21:52:00,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:52:00,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 21:52:00,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 21:52:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:52:00,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 21:52:00,691 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-02 21:52:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:00,692 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 21:52:00,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 21:52:00,698 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 21:52:00,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:52:00,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:00,699 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:52:00,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 21:52:00,921 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:00,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:00,921 INFO L82 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2021-05-02 21:52:00,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:00,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087479635] [2021-05-02 21:52:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:00,932 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:00,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390456785] [2021-05-02 21:52:00,932 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 21:52:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:01,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 21:52:01,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:01,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:01,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:01,274 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 21:52:01,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:01,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087479635] [2021-05-02 21:52:01,298 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:01,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390456785] [2021-05-02 21:52:01,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390456785] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:52:01,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:52:01,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 21:52:01,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182217729] [2021-05-02 21:52:01,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:52:01,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:01,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:52:01,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:52:01,301 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 21:52:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:01,471 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 21:52:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:52:01,472 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 18 [2021-05-02 21:52:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:01,473 INFO L225 Difference]: With dead ends: 35 [2021-05-02 21:52:01,473 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 21:52:01,473 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:52:01,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 21:52:01,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-02 21:52:01,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:52:01,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 21:52:01,477 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 18 [2021-05-02 21:52:01,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:01,477 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 21:52:01,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 21:52:01,478 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 21:52:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:52:01,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:01,478 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:52:01,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:01,705 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:01,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:01,706 INFO L82 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2021-05-02 21:52:01,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:01,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695729156] [2021-05-02 21:52:01,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:01,727 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:01,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319984692] [2021-05-02 21:52:01,727 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 21:52:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:01,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 21:52:01,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:01,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:01,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:01,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:01,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:01,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:01,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:52:02,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:02,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695729156] [2021-05-02 21:52:02,052 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:02,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319984692] [2021-05-02 21:52:02,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319984692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:02,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:02,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 21:52:02,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30878077] [2021-05-02 21:52:02,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 21:52:02,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:02,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 21:52:02,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 21:52:02,054 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:52:02,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:02,124 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-05-02 21:52:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 21:52:02,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 21:52:02,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:02,126 INFO L225 Difference]: With dead ends: 37 [2021-05-02 21:52:02,126 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 21:52:02,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:52:02,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 21:52:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 21:52:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:52:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-05-02 21:52:02,130 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2021-05-02 21:52:02,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:02,131 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-05-02 21:52:02,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:52:02,131 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-05-02 21:52:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:52:02,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:02,132 INFO L523 BasicCegarLoop]: trace histogram [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 21:52:02,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:02,365 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:02,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:02,365 INFO L82 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2021-05-02 21:52:02,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:02,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661891227] [2021-05-02 21:52:02,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:02,376 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:02,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905669976] [2021-05-02 21:52:02,376 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 21:52:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:02,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 21:52:02,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:02,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:02,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:52:03,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:03,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661891227] [2021-05-02 21:52:03,123 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:03,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905669976] [2021-05-02 21:52:03,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905669976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:03,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:03,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 21:52:03,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123386390] [2021-05-02 21:52:03,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 21:52:03,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:03,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 21:52:03,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:52:03,126 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:05,387 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-05-02 21:52:05,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 21:52:05,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 21:52:05,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:05,389 INFO L225 Difference]: With dead ends: 49 [2021-05-02 21:52:05,389 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 21:52:05,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 21:52:05,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 21:52:05,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-05-02 21:52:05,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:52:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-05-02 21:52:05,394 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 28 [2021-05-02 21:52:05,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:05,394 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-05-02 21:52:05,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-05-02 21:52:05,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:52:05,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:05,395 INFO L523 BasicCegarLoop]: trace histogram [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 21:52:05,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:05,617 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:05,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:05,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2021-05-02 21:52:05,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:05,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3267575] [2021-05-02 21:52:05,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:05,637 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:05,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471781247] [2021-05-02 21:52:05,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:05,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 21:52:05,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:05,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:05,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:52:06,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:06,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3267575] [2021-05-02 21:52:06,014 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:06,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471781247] [2021-05-02 21:52:06,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471781247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:06,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:06,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 21:52:06,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526593915] [2021-05-02 21:52:06,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 21:52:06,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:06,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 21:52:06,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:52:06,018 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:06,128 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-05-02 21:52:06,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 21:52:06,128 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 21:52:06,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:06,130 INFO L225 Difference]: With dead ends: 53 [2021-05-02 21:52:06,130 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 21:52:06,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:52:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 21:52:06,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-02 21:52:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 21:52:06,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-05-02 21:52:06,136 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2021-05-02 21:52:06,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:06,136 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-05-02 21:52:06,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:06,136 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-05-02 21:52:06,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 21:52:06,137 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:06,137 INFO L523 BasicCegarLoop]: trace histogram [3, 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 21:52:06,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:06,360 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:06,360 INFO L82 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2021-05-02 21:52:06,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:06,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815822824] [2021-05-02 21:52:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:06,369 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:06,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191176014] [2021-05-02 21:52:06,370 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 21:52:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:06,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 21:52:06,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:06,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 21:52:06,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:06,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815822824] [2021-05-02 21:52:06,627 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:06,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191176014] [2021-05-02 21:52:06,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191176014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:06,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:06,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 21:52:06,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778904591] [2021-05-02 21:52:06,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 21:52:06,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:06,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 21:52:06,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 21:52:06,628 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:52:08,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:08,886 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-05-02 21:52:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 21:52:08,886 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 21:52:08,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:08,891 INFO L225 Difference]: With dead ends: 57 [2021-05-02 21:52:08,891 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 21:52:08,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-02 21:52:08,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 21:52:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-05-02 21:52:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:52:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 21:52:08,903 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 21:52:08,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:08,904 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 21:52:08,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:52:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 21:52:08,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 21:52:08,904 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:08,905 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:52:09,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:09,106 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:09,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:09,106 INFO L82 PathProgramCache]: Analyzing trace with hash -782932132, now seen corresponding path program 2 times [2021-05-02 21:52:09,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:09,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401982484] [2021-05-02 21:52:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:09,114 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:09,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361827077] [2021-05-02 21:52:09,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:09,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:52:09,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:52:09,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 21:52:09,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:09,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:52:09,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:09,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401982484] [2021-05-02 21:52:09,295 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:09,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361827077] [2021-05-02 21:52:09,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361827077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:09,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:09,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 21:52:09,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532665136] [2021-05-02 21:52:09,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 21:52:09,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:09,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 21:52:09,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:52:09,297 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:52:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:09,335 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-02 21:52:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:52:09,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2021-05-02 21:52:09,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:09,337 INFO L225 Difference]: With dead ends: 47 [2021-05-02 21:52:09,337 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 21:52:09,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:52:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 21:52:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 21:52:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:52:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-02 21:52:09,340 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2021-05-02 21:52:09,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:09,340 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-02 21:52:09,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:52:09,341 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-02 21:52:09,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 21:52:09,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:09,341 INFO L523 BasicCegarLoop]: trace histogram [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 21:52:09,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:09,563 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:09,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:09,563 INFO L82 PathProgramCache]: Analyzing trace with hash -781829865, now seen corresponding path program 2 times [2021-05-02 21:52:09,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:09,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262860684] [2021-05-02 21:52:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:09,570 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:09,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967167308] [2021-05-02 21:52:09,570 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 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 21:52:09,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:52:09,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:52:09,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 21:52:09,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:09,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:09,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:15,839 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 21:52:23,911 WARN L205 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 21:52:36,018 WARN L205 SmtUtils]: Spent 12.07 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 21:52:44,153 WARN L205 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-05-02 21:52:44,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,390 WARN L159 QuantifierPusher]: Ignoring assumption.