/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/egcd3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:33:17,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:33:17,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:33:17,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:33:17,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:33:17,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:33:17,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:33:17,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:33:17,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:33:17,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:33:17,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:33:17,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:33:17,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:33:17,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:33:17,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:33:17,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:33:17,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:33:17,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:33:17,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:33:17,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:33:17,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:33:17,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:33:17,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:33:17,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:33:17,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:33:17,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:33:17,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:33:17,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:33:17,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:33:17,433 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:33:17,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:33:17,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:33:17,436 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:33:17,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:33:17,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:33:17,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:33:17,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:33:17,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:33:17,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:33:17,438 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:33:17,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:33:17,438 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:33:17,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:33:17,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:33:17,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:33:17,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:33:17,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:33:17,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:33:17,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:33:17,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:33:17,441 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:33:17,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:33:17,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:33:17,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:33:17,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:33:17,791 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:33:17,791 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:33:17,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2021-05-02 20:33:17,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/907300665/3b5abcccbc5e4a9f8b0036691d625c34/FLAG6ecfe8d6f [2021-05-02 20:33:18,232 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:33:18,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2021-05-02 20:33:18,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/907300665/3b5abcccbc5e4a9f8b0036691d625c34/FLAG6ecfe8d6f [2021-05-02 20:33:18,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/907300665/3b5abcccbc5e4a9f8b0036691d625c34 [2021-05-02 20:33:18,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:33:18,264 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:33:18,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:33:18,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:33:18,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:33:18,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:33:18" (1/1) ... [2021-05-02 20:33:18,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56cee643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:18, skipping insertion in model container [2021-05-02 20:33:18,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:33:18" (1/1) ... [2021-05-02 20:33:18,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:33:18,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:33:18,456 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/egcd3-ll_unwindbound50.c[490,503] [2021-05-02 20:33:18,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:33:18,498 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:33:18,517 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/egcd3-ll_unwindbound50.c[490,503] [2021-05-02 20:33:18,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:33:18,564 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:33:18,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:18 WrapperNode [2021-05-02 20:33:18,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:33:18,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:33:18,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:33:18,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:33:18,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:18" (1/1) ... [2021-05-02 20:33:18,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:18" (1/1) ... [2021-05-02 20:33:18,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:18" (1/1) ... [2021-05-02 20:33:18,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:18" (1/1) ... [2021-05-02 20:33:18,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:18" (1/1) ... [2021-05-02 20:33:18,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:18" (1/1) ... [2021-05-02 20:33:18,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:18" (1/1) ... [2021-05-02 20:33:18,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:33:18,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:33:18,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:33:18,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:33:18,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:33:18,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:33:18,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:33:18,668 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:33:18,668 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:33:18,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:33:18,669 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:33:18,669 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:33:18,669 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:33:18,669 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:33:18,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:33:18,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:33:18,670 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:33:18,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:33:18,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:33:18,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:33:18,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:33:18,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:33:18,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:33:18,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:33:18,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:33:18,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:33:18,919 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:33:18,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:18 BoogieIcfgContainer [2021-05-02 20:33:18,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:33:18,921 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:33:18,921 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:33:18,922 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:33:18,924 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:18" (1/1) ... [2021-05-02 20:33:18,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:33:18 BasicIcfg [2021-05-02 20:33:18,939 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:33:18,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:33:18,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:33:18,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:33:18,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:33:18" (1/4) ... [2021-05-02 20:33:18,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9afe1cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:33:18, skipping insertion in model container [2021-05-02 20:33:18,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:18" (2/4) ... [2021-05-02 20:33:18,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9afe1cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:33:18, skipping insertion in model container [2021-05-02 20:33:18,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:18" (3/4) ... [2021-05-02 20:33:18,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9afe1cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:33:18, skipping insertion in model container [2021-05-02 20:33:18,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:33:18" (4/4) ... [2021-05-02 20:33:18,945 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.cJordan [2021-05-02 20:33:18,950 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:33:18,953 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:33:18,966 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:33:18,981 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:33:18,981 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:33:18,981 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:33:18,981 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:33:18,981 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:33:18,981 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:33:18,981 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:33:18,982 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:33:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:33:19,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:33:19,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:19,019 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:19,020 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:19,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:19,024 INFO L82 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2021-05-02 20:33:19,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:19,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011766787] [2021-05-02 20:33:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:19,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:33:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:19,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:33:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:19,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:33:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:19,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:19,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011766787] [2021-05-02 20:33:19,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011766787] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:19,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:19,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:33:19,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905751845] [2021-05-02 20:33:19,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:33:19,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:19,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:33:19,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:33:19,395 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:19,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:19,584 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-05-02 20:33:19,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:33:19,586 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 20:33:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:19,593 INFO L225 Difference]: With dead ends: 41 [2021-05-02 20:33:19,593 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 20:33:19,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:33:19,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 20:33:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 20:33:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:33:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-02 20:33:19,631 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-02 20:33:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:19,632 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-02 20:33:19,632 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:19,632 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-02 20:33:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:33:19,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:19,644 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:19,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:33:19,644 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:19,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:19,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2021-05-02 20:33:19,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:19,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804883420] [2021-05-02 20:33:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:19,659 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:19,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149488178] [2021-05-02 20:33:19,660 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 20:33:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:19,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:33:19,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:19,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:19,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:19,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:19,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:19,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:19,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:19,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804883420] [2021-05-02 20:33:19,879 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:19,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149488178] [2021-05-02 20:33:19,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149488178] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:19,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:19,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:33:19,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046400282] [2021-05-02 20:33:19,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:33:19,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:19,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:33:19,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:33:19,882 INFO L87 Difference]: Start difference. First operand 35 states and 45 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:19,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:19,912 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-02 20:33:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:33:19,915 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:33:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:19,916 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:33:19,916 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 20:33:19,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:33:19,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 20:33:19,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 20:33:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:33:19,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-02 20:33:19,923 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-02 20:33:19,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:19,924 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-02 20:33:19,924 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:19,924 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-02 20:33:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 20:33:19,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:19,925 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:20,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:33:20,145 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:20,146 INFO L82 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2021-05-02 20:33:20,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:20,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447490086] [2021-05-02 20:33:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:20,164 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:20,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228392769] [2021-05-02 20:33:20,165 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 20:33:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:20,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:33:20,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:20,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:33:20,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:20,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447490086] [2021-05-02 20:33:20,337 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:20,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228392769] [2021-05-02 20:33:20,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228392769] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:20,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:20,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:33:20,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529320040] [2021-05-02 20:33:20,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:33:20,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:20,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:33:20,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:20,339 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:33:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:20,447 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2021-05-02 20:33:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:20,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-02 20:33:20,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:20,449 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:33:20,449 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 20:33:20,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:20,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 20:33:20,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-02 20:33:20,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:33:20,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-02 20:33:20,456 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-02 20:33:20,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:20,456 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-02 20:33:20,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:33:20,456 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-02 20:33:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:33:20,457 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:20,457 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, 1] [2021-05-02 20:33:20,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:20,670 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:20,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:20,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2021-05-02 20:33:20,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:20,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517311880] [2021-05-02 20:33:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:20,683 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:20,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894948127] [2021-05-02 20:33:20,683 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 20:33:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:20,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:33:20,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:20,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:20,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:20,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517311880] [2021-05-02 20:33:20,942 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:20,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894948127] [2021-05-02 20:33:20,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894948127] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:20,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:20,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:33:20,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196212392] [2021-05-02 20:33:20,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:33:20,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:20,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:33:20,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:33:20,945 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:20,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:20,989 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-02 20:33:20,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:33:20,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 20:33:20,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:20,991 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:33:20,991 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 20:33:20,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:33:20,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 20:33:20,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 20:33:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:33:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-02 20:33:20,997 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2021-05-02 20:33:20,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:20,997 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-02 20:33:20,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-02 20:33:20,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:33:20,998 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:20,998 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:21,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:21,213 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:21,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:21,214 INFO L82 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2021-05-02 20:33:21,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:21,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111996033] [2021-05-02 20:33:21,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:21,231 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:21,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589356376] [2021-05-02 20:33:21,232 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 20:33:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:21,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:33:21,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:21,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:21,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:21,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111996033] [2021-05-02 20:33:21,520 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:21,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589356376] [2021-05-02 20:33:21,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589356376] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:21,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:21,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:33:21,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909314261] [2021-05-02 20:33:21,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:21,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:21,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:21,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:21,522 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 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 20:33:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:21,620 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2021-05-02 20:33:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:33:21,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 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 29 [2021-05-02 20:33:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:21,624 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:33:21,624 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 20:33:21,625 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 20:33:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 20:33:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:33:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-05-02 20:33:21,632 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2021-05-02 20:33:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:21,632 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-05-02 20:33:21,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 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 20:33:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-05-02 20:33:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 20:33:21,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:21,633 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, 1, 1] [2021-05-02 20:33:21,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:21,837 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:21,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:21,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2021-05-02 20:33:21,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:21,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775114281] [2021-05-02 20:33:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:21,846 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:21,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224292250] [2021-05-02 20:33:21,847 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 20:33:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:21,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:33:21,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:21,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:21,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:21,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775114281] [2021-05-02 20:33:21,997 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:21,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224292250] [2021-05-02 20:33:21,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224292250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:21,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:21,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:33:21,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67402160] [2021-05-02 20:33:21,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:33:21,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:21,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:33:21,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:21,999 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:22,035 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2021-05-02 20:33:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:33:22,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-05-02 20:33:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:22,037 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:33:22,037 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:33:22,037 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:33:22,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:33:22,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 20:33:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:33:22,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-05-02 20:33:22,044 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2021-05-02 20:33:22,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:22,044 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-05-02 20:33:22,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:22,044 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-05-02 20:33:22,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 20:33:22,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:22,045 INFO L523 BasicCegarLoop]: trace histogram [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 20:33:22,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:33:22,253 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:22,253 INFO L82 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2021-05-02 20:33:22,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:22,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395613865] [2021-05-02 20:33:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:22,273 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:22,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121736700] [2021-05-02 20:33:22,273 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 20:33:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:22,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:33:22,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:22,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:22,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:22,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:22,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:22,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:33:22,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:22,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395613865] [2021-05-02 20:33:22,527 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:22,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121736700] [2021-05-02 20:33:22,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121736700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:22,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:22,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:33:22,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844346876] [2021-05-02 20:33:22,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:33:22,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:22,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:33:22,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:22,529 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 20:33:22,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:22,746 INFO L93 Difference]: Finished difference Result 131 states and 193 transitions. [2021-05-02 20:33:22,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:33:22,746 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 31 [2021-05-02 20:33:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:22,750 INFO L225 Difference]: With dead ends: 131 [2021-05-02 20:33:22,750 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 20:33:22,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:33:22,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 20:33:22,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-05-02 20:33:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:33:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2021-05-02 20:33:22,775 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2021-05-02 20:33:22,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:22,776 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2021-05-02 20:33:22,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 20:33:22,776 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2021-05-02 20:33:22,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:33:22,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:22,778 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, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:22,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:22,993 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:22,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:22,993 INFO L82 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2021-05-02 20:33:22,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:22,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542270672] [2021-05-02 20:33:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:23,003 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:23,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136556702] [2021-05-02 20:33:23,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:23,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:33:23,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:23,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:33:23,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:23,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542270672] [2021-05-02 20:33:23,181 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:23,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136556702] [2021-05-02 20:33:23,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136556702] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:23,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:23,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:33:23,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979231948] [2021-05-02 20:33:23,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:33:23,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:23,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:33:23,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:23,183 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:33:23,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:23,269 INFO L93 Difference]: Finished difference Result 93 states and 126 transitions. [2021-05-02 20:33:23,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:33:23,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 20:33:23,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:23,271 INFO L225 Difference]: With dead ends: 93 [2021-05-02 20:33:23,271 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 20:33:23,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 20:33:23,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 20:33:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 70 states have internal predecessors, (93), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:33:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2021-05-02 20:33:23,288 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 34 [2021-05-02 20:33:23,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:23,289 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2021-05-02 20:33:23,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:33:23,289 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2021-05-02 20:33:23,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 20:33:23,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:23,293 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-02 20:33:23,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:23,494 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:23,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:23,494 INFO L82 PathProgramCache]: Analyzing trace with hash 541001134, now seen corresponding path program 1 times [2021-05-02 20:33:23,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:23,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582147933] [2021-05-02 20:33:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:23,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:23,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941890655] [2021-05-02 20:33:23,506 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 20:33:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:23,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:33:23,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:23,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:23,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:23,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582147933] [2021-05-02 20:33:23,666 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:23,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941890655] [2021-05-02 20:33:23,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941890655] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:23,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:23,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:33:23,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345698401] [2021-05-02 20:33:23,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:33:23,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:23,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:33:23,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:23,669 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:23,701 INFO L93 Difference]: Finished difference Result 94 states and 127 transitions. [2021-05-02 20:33:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:23,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-05-02 20:33:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:23,703 INFO L225 Difference]: With dead ends: 94 [2021-05-02 20:33:23,703 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 20:33:23,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 20:33:23,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-02 20:33:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 72 states have internal predecessors, (95), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:33:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2021-05-02 20:33:23,709 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 35 [2021-05-02 20:33:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:23,709 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2021-05-02 20:33:23,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:23,709 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2021-05-02 20:33:23,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:33:23,710 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:23,710 INFO L523 BasicCegarLoop]: trace histogram [3, 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 20:33:23,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:33:23,919 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:23,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1873858129, now seen corresponding path program 1 times [2021-05-02 20:33:23,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:23,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422558986] [2021-05-02 20:33:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:23,938 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:23,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544829548] [2021-05-02 20:33:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:23,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:33:23,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:23,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:24,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:24,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422558986] [2021-05-02 20:33:24,110 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:24,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544829548] [2021-05-02 20:33:24,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544829548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:24,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:24,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:33:24,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460938195] [2021-05-02 20:33:24,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:33:24,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:24,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:33:24,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:33:24,111 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:24,170 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2021-05-02 20:33:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:33:24,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 20:33:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:24,171 INFO L225 Difference]: With dead ends: 120 [2021-05-02 20:33:24,172 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 20:33:24,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:24,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 20:33:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-05-02 20:33:24,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:33:24,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-05-02 20:33:24,178 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 36 [2021-05-02 20:33:24,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:24,178 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-05-02 20:33:24,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:24,179 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-05-02 20:33:24,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:33:24,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:24,179 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:24,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:24,403 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:24,403 INFO L82 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2021-05-02 20:33:24,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:24,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687071754] [2021-05-02 20:33:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:24,411 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:24,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874204243] [2021-05-02 20:33:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:24,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:33:24,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:24,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:33:24,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:24,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687071754] [2021-05-02 20:33:24,597 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:24,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874204243] [2021-05-02 20:33:24,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874204243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:24,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:24,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:33:24,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948556336] [2021-05-02 20:33:24,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:24,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:24,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:24,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:24,598 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 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 20:33:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:24,725 INFO L93 Difference]: Finished difference Result 152 states and 206 transitions. [2021-05-02 20:33:24,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:33:24,726 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 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 36 [2021-05-02 20:33:24,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:24,727 INFO L225 Difference]: With dead ends: 152 [2021-05-02 20:33:24,727 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 20:33:24,727 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:24,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 20:33:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-05-02 20:33:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 20:33:24,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2021-05-02 20:33:24,734 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2021-05-02 20:33:24,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:24,735 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2021-05-02 20:33:24,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 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 20:33:24,735 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2021-05-02 20:33:24,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:33:24,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:24,736 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-02 20:33:24,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:24,959 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:24,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:24,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1011444142, now seen corresponding path program 2 times [2021-05-02 20:33:24,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:24,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749950016] [2021-05-02 20:33:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:24,975 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:24,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436108662] [2021-05-02 20:33:24,975 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 20:33:25,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:25,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:25,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:33:25,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:25,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:25,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:25,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749950016] [2021-05-02 20:33:25,144 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:25,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436108662] [2021-05-02 20:33:25,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436108662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:25,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:25,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:33:25,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798352981] [2021-05-02 20:33:25,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:33:25,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:25,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:33:25,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:25,145 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:25,249 INFO L93 Difference]: Finished difference Result 182 states and 239 transitions. [2021-05-02 20:33:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:25,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-05-02 20:33:25,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:25,252 INFO L225 Difference]: With dead ends: 182 [2021-05-02 20:33:25,252 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 20:33:25,252 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:25,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 20:33:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-05-02 20:33:25,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.31496062992126) internal successors, (167), 129 states have internal predecessors, (167), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 20:33:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2021-05-02 20:33:25,261 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 37 [2021-05-02 20:33:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:25,262 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2021-05-02 20:33:25,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:25,262 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2021-05-02 20:33:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:33:25,263 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:25,263 INFO L523 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1] [2021-05-02 20:33:25,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:33:25,477 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:25,477 INFO L82 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2021-05-02 20:33:25,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:25,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571483449] [2021-05-02 20:33:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:25,485 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:25,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090031522] [2021-05-02 20:33:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:25,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:33:25,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:25,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:33:25,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:25,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571483449] [2021-05-02 20:33:25,652 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:25,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090031522] [2021-05-02 20:33:25,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090031522] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:25,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:25,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:33:25,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459617167] [2021-05-02 20:33:25,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:25,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:25,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:25,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:25,653 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:33:25,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:25,802 INFO L93 Difference]: Finished difference Result 193 states and 254 transitions. [2021-05-02 20:33:25,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:33:25,803 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 20:33:25,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:25,807 INFO L225 Difference]: With dead ends: 193 [2021-05-02 20:33:25,808 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 20:33:25,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 20:33:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 20:33:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 141 states have internal predecessors, (181), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 20:33:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2021-05-02 20:33:25,818 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 39 [2021-05-02 20:33:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:25,818 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2021-05-02 20:33:25,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:33:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2021-05-02 20:33:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:33:25,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:25,819 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-05-02 20:33:26,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:33:26,042 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:26,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:26,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2021-05-02 20:33:26,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:26,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042577537] [2021-05-02 20:33:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:26,057 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:26,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151613709] [2021-05-02 20:33:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:26,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:33:26,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:26,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:33:26,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:26,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042577537] [2021-05-02 20:33:26,281 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:26,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151613709] [2021-05-02 20:33:26,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151613709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:26,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:26,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:26,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366313108] [2021-05-02 20:33:26,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:26,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:26,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:26,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:26,282 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:33:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:26,513 INFO L93 Difference]: Finished difference Result 198 states and 258 transitions. [2021-05-02 20:33:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:26,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-05-02 20:33:26,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:26,516 INFO L225 Difference]: With dead ends: 198 [2021-05-02 20:33:26,516 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 20:33:26,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:26,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 20:33:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2021-05-02 20:33:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 142 states have (on average 1.295774647887324) internal successors, (184), 144 states have internal predecessors, (184), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 20:33:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 256 transitions. [2021-05-02 20:33:26,527 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 256 transitions. Word has length 41 [2021-05-02 20:33:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:26,528 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 256 transitions. [2021-05-02 20:33:26,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:33:26,529 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 256 transitions. [2021-05-02 20:33:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 20:33:26,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:26,529 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:26,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:33:26,733 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:26,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:26,733 INFO L82 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2021-05-02 20:33:26,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:26,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395481867] [2021-05-02 20:33:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:26,741 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:26,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300263134] [2021-05-02 20:33:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order 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 20:33:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:26,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:33:26,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:26,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 20:33:26,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:26,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395481867] [2021-05-02 20:33:26,891 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:26,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300263134] [2021-05-02 20:33:26,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300263134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:26,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:26,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:33:26,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718450755] [2021-05-02 20:33:26,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:33:26,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:26,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:33:26,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:33:26,892 INFO L87 Difference]: Start difference. First operand 196 states and 256 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:33:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:26,960 INFO L93 Difference]: Finished difference Result 258 states and 356 transitions. [2021-05-02 20:33:26,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:33:26,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-05-02 20:33:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:26,962 INFO L225 Difference]: With dead ends: 258 [2021-05-02 20:33:26,962 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 20:33:26,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:26,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 20:33:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 230. [2021-05-02 20:33:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 155 states have (on average 1.2967741935483872) internal successors, (201), 162 states have internal predecessors, (201), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 20:33:26,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 313 transitions. [2021-05-02 20:33:26,984 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 313 transitions. Word has length 44 [2021-05-02 20:33:26,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:26,984 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 313 transitions. [2021-05-02 20:33:26,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:33:26,985 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 313 transitions. [2021-05-02 20:33:26,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:33:26,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:26,985 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2021-05-02 20:33:27,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:27,209 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash -982799261, now seen corresponding path program 1 times [2021-05-02 20:33:27,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:27,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883118972] [2021-05-02 20:33:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:27,217 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:27,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606351164] [2021-05-02 20:33:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:27,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:33:27,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:27,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:27,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:27,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883118972] [2021-05-02 20:33:27,377 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:27,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606351164] [2021-05-02 20:33:27,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606351164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:27,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:27,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:33:27,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200456907] [2021-05-02 20:33:27,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:33:27,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:27,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:33:27,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:27,378 INFO L87 Difference]: Start difference. First operand 230 states and 313 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:27,461 INFO L93 Difference]: Finished difference Result 241 states and 323 transitions. [2021-05-02 20:33:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:27,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-05-02 20:33:27,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:27,463 INFO L225 Difference]: With dead ends: 241 [2021-05-02 20:33:27,463 INFO L226 Difference]: Without dead ends: 241 [2021-05-02 20:33:27,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:27,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-02 20:33:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2021-05-02 20:33:27,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 162 states have (on average 1.2839506172839505) internal successors, (208), 168 states have internal predecessors, (208), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 20:33:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 320 transitions. [2021-05-02 20:33:27,475 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 320 transitions. Word has length 42 [2021-05-02 20:33:27,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:27,475 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 320 transitions. [2021-05-02 20:33:27,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:27,475 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 320 transitions. [2021-05-02 20:33:27,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:33:27,476 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:27,476 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:27,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:33:27,689 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:27,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1867030118, now seen corresponding path program 2 times [2021-05-02 20:33:27,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:27,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393515252] [2021-05-02 20:33:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:27,697 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:27,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018514470] [2021-05-02 20:33:27,697 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 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 20:33:27,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:27,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:27,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:33:27,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:27,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 20:33:27,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:27,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393515252] [2021-05-02 20:33:27,837 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:27,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018514470] [2021-05-02 20:33:27,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018514470] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:27,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:27,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:33:27,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526588971] [2021-05-02 20:33:27,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:33:27,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:27,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:33:27,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:33:27,839 INFO L87 Difference]: Start difference. First operand 237 states and 320 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:33:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:27,937 INFO L93 Difference]: Finished difference Result 375 states and 550 transitions. [2021-05-02 20:33:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:27,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-05-02 20:33:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:27,939 INFO L225 Difference]: With dead ends: 375 [2021-05-02 20:33:27,939 INFO L226 Difference]: Without dead ends: 375 [2021-05-02 20:33:27,939 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:33:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-02 20:33:27,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 261. [2021-05-02 20:33:27,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 186 states have (on average 1.3010752688172043) internal successors, (242), 192 states have internal predecessors, (242), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 20:33:27,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 354 transitions. [2021-05-02 20:33:27,951 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 354 transitions. Word has length 43 [2021-05-02 20:33:27,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:27,951 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 354 transitions. [2021-05-02 20:33:27,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:33:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 354 transitions. [2021-05-02 20:33:27,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:33:27,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:27,952 INFO L523 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2021-05-02 20:33:28,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:33:28,167 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1204922772, now seen corresponding path program 1 times [2021-05-02 20:33:28,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:28,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177628520] [2021-05-02 20:33:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:28,175 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:28,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076193482] [2021-05-02 20:33:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:28,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:33:28,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:28,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 20:33:28,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:28,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177628520] [2021-05-02 20:33:28,400 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:28,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076193482] [2021-05-02 20:33:28,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076193482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:28,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:28,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:33:28,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176734711] [2021-05-02 20:33:28,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:33:28,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:28,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:33:28,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:28,403 INFO L87 Difference]: Start difference. First operand 261 states and 354 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:33:28,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:28,693 INFO L93 Difference]: Finished difference Result 335 states and 474 transitions. [2021-05-02 20:33:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:33:28,694 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-05-02 20:33:28,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:28,696 INFO L225 Difference]: With dead ends: 335 [2021-05-02 20:33:28,696 INFO L226 Difference]: Without dead ends: 335 [2021-05-02 20:33:28,696 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:33:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-05-02 20:33:28,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 292. [2021-05-02 20:33:28,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 200 states have (on average 1.315) internal successors, (263), 208 states have internal predecessors, (263), 73 states have call successors, (73), 19 states have call predecessors, (73), 18 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 20:33:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 407 transitions. [2021-05-02 20:33:28,706 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 407 transitions. Word has length 46 [2021-05-02 20:33:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:28,706 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 407 transitions. [2021-05-02 20:33:28,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:33:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 407 transitions. [2021-05-02 20:33:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 20:33:28,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:28,707 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:28,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:33:28,921 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:28,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:28,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2021-05-02 20:33:28,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:28,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760995216] [2021-05-02 20:33:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:28,931 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:28,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158010766] [2021-05-02 20:33:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:29,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 20:33:29,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:29,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:33:29,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:29,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760995216] [2021-05-02 20:33:29,432 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:29,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158010766] [2021-05-02 20:33:29,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158010766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:29,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:29,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:33:29,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986141587] [2021-05-02 20:33:29,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:33:29,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:29,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:33:29,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:33:29,435 INFO L87 Difference]: Start difference. First operand 292 states and 407 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:30,043 INFO L93 Difference]: Finished difference Result 323 states and 450 transitions. [2021-05-02 20:33:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:33:30,043 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2021-05-02 20:33:30,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:30,045 INFO L225 Difference]: With dead ends: 323 [2021-05-02 20:33:30,046 INFO L226 Difference]: Without dead ends: 322 [2021-05-02 20:33:30,046 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 443.7ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:33:30,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-02 20:33:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2021-05-02 20:33:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 217 states have (on average 1.3133640552995391) internal successors, (285), 226 states have internal predecessors, (285), 81 states have call successors, (81), 21 states have call predecessors, (81), 20 states have return successors, (79), 71 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 20:33:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 445 transitions. [2021-05-02 20:33:30,057 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 445 transitions. Word has length 58 [2021-05-02 20:33:30,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:30,057 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 445 transitions. [2021-05-02 20:33:30,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 445 transitions. [2021-05-02 20:33:30,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 20:33:30,058 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:30,058 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:30,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:30,273 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:30,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:30,273 INFO L82 PathProgramCache]: Analyzing trace with hash -80402644, now seen corresponding path program 1 times [2021-05-02 20:33:30,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:30,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520120567] [2021-05-02 20:33:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:30,280 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:30,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010883066] [2021-05-02 20:33:30,280 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 20:33:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:30,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:33:30,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:30,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:33:30,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:30,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520120567] [2021-05-02 20:33:30,475 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:30,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010883066] [2021-05-02 20:33:30,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010883066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:30,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:30,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:33:30,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136739529] [2021-05-02 20:33:30,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:30,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:30,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:30,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:30,477 INFO L87 Difference]: Start difference. First operand 319 states and 445 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:30,585 INFO L93 Difference]: Finished difference Result 376 states and 499 transitions. [2021-05-02 20:33:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:33:30,586 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2021-05-02 20:33:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:30,587 INFO L225 Difference]: With dead ends: 376 [2021-05-02 20:33:30,588 INFO L226 Difference]: Without dead ends: 376 [2021-05-02 20:33:30,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-02 20:33:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 363. [2021-05-02 20:33:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 249 states have (on average 1.2811244979919678) internal successors, (319), 257 states have internal predecessors, (319), 85 states have call successors, (85), 29 states have call predecessors, (85), 28 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-02 20:33:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 487 transitions. [2021-05-02 20:33:30,598 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 487 transitions. Word has length 63 [2021-05-02 20:33:30,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:30,599 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 487 transitions. [2021-05-02 20:33:30,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 487 transitions. [2021-05-02 20:33:30,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 20:33:30,600 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:30,600 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:30,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:30,813 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:30,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:30,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2021-05-02 20:33:30,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:30,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650498811] [2021-05-02 20:33:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:30,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:30,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122219381] [2021-05-02 20:33:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:30,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:33:30,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:30,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:30,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:33:31,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:31,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650498811] [2021-05-02 20:33:31,025 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:31,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122219381] [2021-05-02 20:33:31,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122219381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:31,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:31,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:31,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185679778] [2021-05-02 20:33:31,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:31,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:31,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:31,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:31,026 INFO L87 Difference]: Start difference. First operand 363 states and 487 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:31,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:31,191 INFO L93 Difference]: Finished difference Result 450 states and 586 transitions. [2021-05-02 20:33:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:33:31,192 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2021-05-02 20:33:31,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:31,194 INFO L225 Difference]: With dead ends: 450 [2021-05-02 20:33:31,194 INFO L226 Difference]: Without dead ends: 450 [2021-05-02 20:33:31,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:33:31,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-02 20:33:31,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 430. [2021-05-02 20:33:31,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 295 states have (on average 1.264406779661017) internal successors, (373), 307 states have internal predecessors, (373), 98 states have call successors, (98), 37 states have call predecessors, (98), 36 states have return successors, (95), 85 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-02 20:33:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 566 transitions. [2021-05-02 20:33:31,207 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 566 transitions. Word has length 64 [2021-05-02 20:33:31,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:31,208 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 566 transitions. [2021-05-02 20:33:31,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:31,208 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 566 transitions. [2021-05-02 20:33:31,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 20:33:31,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:31,209 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 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 20:33:31,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 20:33:31,425 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:31,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:31,426 INFO L82 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2021-05-02 20:33:31,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:31,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25354443] [2021-05-02 20:33:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:31,432 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:31,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376376497] [2021-05-02 20:33:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:31,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 20:33:31,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:31,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-02 20:33:31,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:31,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25354443] [2021-05-02 20:33:31,653 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:31,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376376497] [2021-05-02 20:33:31,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376376497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:31,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:31,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:31,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63638025] [2021-05-02 20:33:31,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:31,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:31,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:31,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:31,655 INFO L87 Difference]: Start difference. First operand 430 states and 566 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:33:31,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:31,851 INFO L93 Difference]: Finished difference Result 458 states and 602 transitions. [2021-05-02 20:33:31,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:31,852 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2021-05-02 20:33:31,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:31,854 INFO L225 Difference]: With dead ends: 458 [2021-05-02 20:33:31,854 INFO L226 Difference]: Without dead ends: 458 [2021-05-02 20:33:31,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:33:31,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-02 20:33:31,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 440. [2021-05-02 20:33:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 301 states have (on average 1.2624584717607974) internal successors, (380), 313 states have internal predecessors, (380), 101 states have call successors, (101), 38 states have call predecessors, (101), 37 states have return successors, (98), 88 states have call predecessors, (98), 98 states have call successors, (98) [2021-05-02 20:33:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 579 transitions. [2021-05-02 20:33:31,868 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 579 transitions. Word has length 67 [2021-05-02 20:33:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:31,868 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 579 transitions. [2021-05-02 20:33:31,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:33:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 579 transitions. [2021-05-02 20:33:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 20:33:31,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:31,869 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:32,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 20:33:32,085 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:32,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:32,085 INFO L82 PathProgramCache]: Analyzing trace with hash -28038179, now seen corresponding path program 2 times [2021-05-02 20:33:32,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:32,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050183160] [2021-05-02 20:33:32,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:32,093 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:32,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406045301] [2021-05-02 20:33:32,093 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:32,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:32,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:32,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:33:32,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:32,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:33:32,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:32,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050183160] [2021-05-02 20:33:32,298 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:32,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406045301] [2021-05-02 20:33:32,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406045301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:32,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:32,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:33:32,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625385648] [2021-05-02 20:33:32,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:33:32,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:32,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:33:32,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:32,299 INFO L87 Difference]: Start difference. First operand 440 states and 579 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:33:32,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:32,683 INFO L93 Difference]: Finished difference Result 776 states and 1140 transitions. [2021-05-02 20:33:32,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:33:32,684 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-05-02 20:33:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:32,687 INFO L225 Difference]: With dead ends: 776 [2021-05-02 20:33:32,688 INFO L226 Difference]: Without dead ends: 776 [2021-05-02 20:33:32,688 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:33:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-05-02 20:33:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 502. [2021-05-02 20:33:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 347 states have (on average 1.2881844380403458) internal successors, (447), 359 states have internal predecessors, (447), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 104 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 20:33:32,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 678 transitions. [2021-05-02 20:33:32,711 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 678 transitions. Word has length 65 [2021-05-02 20:33:32,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:32,711 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 678 transitions. [2021-05-02 20:33:32,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:33:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 678 transitions. [2021-05-02 20:33:32,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 20:33:32,713 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:32,713 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:32,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:32,931 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:32,931 INFO L82 PathProgramCache]: Analyzing trace with hash 695478703, now seen corresponding path program 1 times [2021-05-02 20:33:32,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:32,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623201896] [2021-05-02 20:33:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:32,938 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:32,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869433611] [2021-05-02 20:33:32,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:32,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:33:32,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:33,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:33:33,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:33,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623201896] [2021-05-02 20:33:33,121 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:33,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869433611] [2021-05-02 20:33:33,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869433611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:33,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:33,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:33:33,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985807680] [2021-05-02 20:33:33,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:33,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:33,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:33,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:33,122 INFO L87 Difference]: Start difference. First operand 502 states and 678 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:33,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:33,233 INFO L93 Difference]: Finished difference Result 504 states and 676 transitions. [2021-05-02 20:33:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:33:33,234 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-05-02 20:33:33,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:33,236 INFO L225 Difference]: With dead ends: 504 [2021-05-02 20:33:33,236 INFO L226 Difference]: Without dead ends: 504 [2021-05-02 20:33:33,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:33,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-05-02 20:33:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 502. [2021-05-02 20:33:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 347 states have (on average 1.2795389048991355) internal successors, (444), 359 states have internal predecessors, (444), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 104 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 20:33:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 675 transitions. [2021-05-02 20:33:33,252 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 675 transitions. Word has length 65 [2021-05-02 20:33:33,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:33,253 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 675 transitions. [2021-05-02 20:33:33,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 675 transitions. [2021-05-02 20:33:33,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:33:33,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:33,255 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:33,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 20:33:33,473 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:33,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:33,473 INFO L82 PathProgramCache]: Analyzing trace with hash -609169376, now seen corresponding path program 1 times [2021-05-02 20:33:33,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:33,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549600299] [2021-05-02 20:33:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:33,481 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:33,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957843761] [2021-05-02 20:33:33,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:33,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:33:33,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:33,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 20:33:33,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:33,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549600299] [2021-05-02 20:33:33,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:33,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957843761] [2021-05-02 20:33:33,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957843761] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:33,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:33,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:33:33,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318310461] [2021-05-02 20:33:33,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:33:33,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:33,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:33:33,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:33:33,707 INFO L87 Difference]: Start difference. First operand 502 states and 675 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:33:33,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:33,759 INFO L93 Difference]: Finished difference Result 584 states and 784 transitions. [2021-05-02 20:33:33,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:33,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-05-02 20:33:33,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:33,766 INFO L225 Difference]: With dead ends: 584 [2021-05-02 20:33:33,767 INFO L226 Difference]: Without dead ends: 584 [2021-05-02 20:33:33,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:33,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-05-02 20:33:33,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 528. [2021-05-02 20:33:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 373 states have (on average 1.2868632707774799) internal successors, (480), 379 states have internal predecessors, (480), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 20:33:33,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 711 transitions. [2021-05-02 20:33:33,783 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 711 transitions. Word has length 69 [2021-05-02 20:33:33,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:33,783 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 711 transitions. [2021-05-02 20:33:33,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:33:33,784 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 711 transitions. [2021-05-02 20:33:33,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:33:33,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:33,785 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:34,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:34,001 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:34,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:34,001 INFO L82 PathProgramCache]: Analyzing trace with hash -893000644, now seen corresponding path program 2 times [2021-05-02 20:33:34,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:34,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750764613] [2021-05-02 20:33:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:34,007 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:34,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954609459] [2021-05-02 20:33:34,007 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:34,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:34,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:34,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:33:34,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:34,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:33:34,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:34,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750764613] [2021-05-02 20:33:34,236 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:34,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954609459] [2021-05-02 20:33:34,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954609459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:34,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:34,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:34,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973629921] [2021-05-02 20:33:34,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:34,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:34,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:34,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:34,239 INFO L87 Difference]: Start difference. First operand 528 states and 711 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:34,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:34,381 INFO L93 Difference]: Finished difference Result 551 states and 732 transitions. [2021-05-02 20:33:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:33:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2021-05-02 20:33:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:34,383 INFO L225 Difference]: With dead ends: 551 [2021-05-02 20:33:34,383 INFO L226 Difference]: Without dead ends: 551 [2021-05-02 20:33:34,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:33:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-05-02 20:33:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 540. [2021-05-02 20:33:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 383 states have (on average 1.279373368146214) internal successors, (490), 386 states have internal predecessors, (490), 118 states have call successors, (118), 39 states have call predecessors, (118), 38 states have return successors, (115), 114 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-02 20:33:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 723 transitions. [2021-05-02 20:33:34,399 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 723 transitions. Word has length 69 [2021-05-02 20:33:34,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:34,399 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 723 transitions. [2021-05-02 20:33:34,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 723 transitions. [2021-05-02 20:33:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 20:33:34,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:34,400 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:34,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:33:34,625 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:34,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:34,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1125561725, now seen corresponding path program 2 times [2021-05-02 20:33:34,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:34,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522317247] [2021-05-02 20:33:34,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:34,634 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:34,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923143560] [2021-05-02 20:33:34,634 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:34,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:34,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:34,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:33:34,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:34,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:33:34,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:34,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522317247] [2021-05-02 20:33:34,863 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:34,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923143560] [2021-05-02 20:33:34,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923143560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:34,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:34,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:33:34,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088114779] [2021-05-02 20:33:34,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:33:34,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:34,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:33:34,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:34,865 INFO L87 Difference]: Start difference. First operand 540 states and 723 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:35,049 INFO L93 Difference]: Finished difference Result 660 states and 852 transitions. [2021-05-02 20:33:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:33:35,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-05-02 20:33:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:35,052 INFO L225 Difference]: With dead ends: 660 [2021-05-02 20:33:35,053 INFO L226 Difference]: Without dead ends: 660 [2021-05-02 20:33:35,053 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:33:35,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-05-02 20:33:35,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 627. [2021-05-02 20:33:35,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 441 states have (on average 1.256235827664399) internal successors, (554), 445 states have internal predecessors, (554), 135 states have call successors, (135), 51 states have call predecessors, (135), 50 states have return successors, (131), 130 states have call predecessors, (131), 131 states have call successors, (131) [2021-05-02 20:33:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 820 transitions. [2021-05-02 20:33:35,069 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 820 transitions. Word has length 70 [2021-05-02 20:33:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:35,070 INFO L480 AbstractCegarLoop]: Abstraction has 627 states and 820 transitions. [2021-05-02 20:33:35,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 820 transitions. [2021-05-02 20:33:35,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 20:33:35,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:35,072 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:35,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 20:33:35,290 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:35,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:35,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1343179262, now seen corresponding path program 1 times [2021-05-02 20:33:35,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:35,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058645814] [2021-05-02 20:33:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:35,298 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:35,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035554531] [2021-05-02 20:33:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:35,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:33:35,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:35,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:33:35,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:35,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058645814] [2021-05-02 20:33:35,822 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:35,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035554531] [2021-05-02 20:33:35,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035554531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:35,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:35,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:33:35,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441972517] [2021-05-02 20:33:35,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:33:35,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:35,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:33:35,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:33:35,823 INFO L87 Difference]: Start difference. First operand 627 states and 820 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:33:37,520 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-02 20:33:37,788 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-05-02 20:33:38,015 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 20:33:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:38,524 INFO L93 Difference]: Finished difference Result 798 states and 1077 transitions. [2021-05-02 20:33:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 20:33:38,524 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 70 [2021-05-02 20:33:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:38,527 INFO L225 Difference]: With dead ends: 798 [2021-05-02 20:33:38,528 INFO L226 Difference]: Without dead ends: 798 [2021-05-02 20:33:38,528 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1948.9ms TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 20:33:38,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-05-02 20:33:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 749. [2021-05-02 20:33:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 530 states have (on average 1.288679245283019) internal successors, (683), 534 states have internal predecessors, (683), 167 states have call successors, (167), 52 states have call predecessors, (167), 51 states have return successors, (163), 162 states have call predecessors, (163), 163 states have call successors, (163) [2021-05-02 20:33:38,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1013 transitions. [2021-05-02 20:33:38,548 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1013 transitions. Word has length 70 [2021-05-02 20:33:38,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:38,548 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 1013 transitions. [2021-05-02 20:33:38,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:33:38,549 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1013 transitions. [2021-05-02 20:33:38,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:33:38,549 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:38,550 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 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] [2021-05-02 20:33:38,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 20:33:38,773 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:38,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:38,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1695740300, now seen corresponding path program 1 times [2021-05-02 20:33:38,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:38,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715269879] [2021-05-02 20:33:38,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:38,781 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:38,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002472273] [2021-05-02 20:33:38,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:38,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:33:38,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:38,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-02 20:33:39,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:39,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715269879] [2021-05-02 20:33:39,052 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:39,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002472273] [2021-05-02 20:33:39,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002472273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:39,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:39,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:33:39,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601865537] [2021-05-02 20:33:39,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:33:39,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:39,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:33:39,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:39,053 INFO L87 Difference]: Start difference. First operand 749 states and 1013 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:33:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:39,494 INFO L93 Difference]: Finished difference Result 1022 states and 1446 transitions. [2021-05-02 20:33:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:33:39,495 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 74 [2021-05-02 20:33:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:39,499 INFO L225 Difference]: With dead ends: 1022 [2021-05-02 20:33:39,499 INFO L226 Difference]: Without dead ends: 1022 [2021-05-02 20:33:39,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-05-02 20:33:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-05-02 20:33:39,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 779. [2021-05-02 20:33:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 545 states have (on average 1.2862385321100918) internal successors, (701), 552 states have internal predecessors, (701), 179 states have call successors, (179), 55 states have call predecessors, (179), 54 states have return successors, (175), 171 states have call predecessors, (175), 175 states have call successors, (175) [2021-05-02 20:33:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1055 transitions. [2021-05-02 20:33:39,522 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1055 transitions. Word has length 74 [2021-05-02 20:33:39,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:39,522 INFO L480 AbstractCegarLoop]: Abstraction has 779 states and 1055 transitions. [2021-05-02 20:33:39,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:33:39,522 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1055 transitions. [2021-05-02 20:33:39,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:33:39,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:39,523 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 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] [2021-05-02 20:33:39,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 20:33:39,737 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:39,737 INFO L82 PathProgramCache]: Analyzing trace with hash 589974765, now seen corresponding path program 2 times [2021-05-02 20:33:39,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:39,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074582929] [2021-05-02 20:33:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:39,749 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:39,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795462801] [2021-05-02 20:33:39,750 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:39,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:39,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:39,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:33:39,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:39,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:39,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 20:33:40,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:40,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074582929] [2021-05-02 20:33:40,012 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:40,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795462801] [2021-05-02 20:33:40,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795462801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:40,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:40,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:33:40,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123505694] [2021-05-02 20:33:40,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:33:40,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:40,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:33:40,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:40,015 INFO L87 Difference]: Start difference. First operand 779 states and 1055 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:33:40,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:40,365 INFO L93 Difference]: Finished difference Result 976 states and 1361 transitions. [2021-05-02 20:33:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:33:40,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2021-05-02 20:33:40,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:40,369 INFO L225 Difference]: With dead ends: 976 [2021-05-02 20:33:40,370 INFO L226 Difference]: Without dead ends: 976 [2021-05-02 20:33:40,371 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-05-02 20:33:40,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-05-02 20:33:40,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 897. [2021-05-02 20:33:40,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 621 states have (on average 1.317230273752013) internal successors, (818), 628 states have internal predecessors, (818), 219 states have call successors, (219), 57 states have call predecessors, (219), 56 states have return successors, (215), 211 states have call predecessors, (215), 215 states have call successors, (215) [2021-05-02 20:33:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1252 transitions. [2021-05-02 20:33:40,407 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1252 transitions. Word has length 73 [2021-05-02 20:33:40,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:40,408 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1252 transitions. [2021-05-02 20:33:40,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:33:40,408 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1252 transitions. [2021-05-02 20:33:40,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:33:40,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:40,409 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 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] [2021-05-02 20:33:40,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:40,610 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:40,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:40,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 3 times [2021-05-02 20:33:40,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:40,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691191484] [2021-05-02 20:33:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:40,616 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:40,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790991807] [2021-05-02 20:33:40,616 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:40,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:33:40,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:40,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 20:33:40,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:40,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:40,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:41,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:41,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:41,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:41,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:41,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:41,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 36 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 20:33:41,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:41,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691191484] [2021-05-02 20:33:41,266 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:41,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790991807] [2021-05-02 20:33:41,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790991807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:41,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:41,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:33:41,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90854007] [2021-05-02 20:33:41,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 20:33:41,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:41,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 20:33:41,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:33:41,267 INFO L87 Difference]: Start difference. First operand 897 states and 1252 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:33:41,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:41,967 INFO L93 Difference]: Finished difference Result 977 states and 1362 transitions. [2021-05-02 20:33:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:33:41,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 75 [2021-05-02 20:33:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:41,972 INFO L225 Difference]: With dead ends: 977 [2021-05-02 20:33:41,972 INFO L226 Difference]: Without dead ends: 977 [2021-05-02 20:33:41,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 577.6ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-02 20:33:41,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-05-02 20:33:41,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 957. [2021-05-02 20:33:41,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 660 states have (on average 1.3212121212121213) internal successors, (872), 668 states have internal predecessors, (872), 236 states have call successors, (236), 61 states have call predecessors, (236), 60 states have return successors, (232), 227 states have call predecessors, (232), 232 states have call successors, (232) [2021-05-02 20:33:41,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1340 transitions. [2021-05-02 20:33:41,995 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1340 transitions. Word has length 75 [2021-05-02 20:33:41,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:41,995 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 1340 transitions. [2021-05-02 20:33:41,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:33:41,996 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1340 transitions. [2021-05-02 20:33:41,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 20:33:41,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:41,997 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:42,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:42,219 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:42,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:42,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1753783729, now seen corresponding path program 3 times [2021-05-02 20:33:42,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:42,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438625830] [2021-05-02 20:33:42,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:42,228 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:42,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467304558] [2021-05-02 20:33:42,229 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:42,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:33:42,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:42,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:33:42,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:42,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:33:42,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:42,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438625830] [2021-05-02 20:33:42,492 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:42,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467304558] [2021-05-02 20:33:42,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467304558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:42,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:42,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:33:42,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805557022] [2021-05-02 20:33:42,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:33:42,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:42,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:33:42,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:42,494 INFO L87 Difference]: Start difference. First operand 957 states and 1340 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:42,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:42,746 INFO L93 Difference]: Finished difference Result 1138 states and 1543 transitions. [2021-05-02 20:33:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:33:42,747 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2021-05-02 20:33:42,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:42,751 INFO L225 Difference]: With dead ends: 1138 [2021-05-02 20:33:42,751 INFO L226 Difference]: Without dead ends: 1138 [2021-05-02 20:33:42,753 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:33:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-05-02 20:33:42,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1108. [2021-05-02 20:33:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 764 states have (on average 1.2905759162303665) internal successors, (986), 773 states have internal predecessors, (986), 268 states have call successors, (268), 76 states have call predecessors, (268), 75 states have return successors, (263), 258 states have call predecessors, (263), 263 states have call successors, (263) [2021-05-02 20:33:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1517 transitions. [2021-05-02 20:33:42,778 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1517 transitions. Word has length 76 [2021-05-02 20:33:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:42,779 INFO L480 AbstractCegarLoop]: Abstraction has 1108 states and 1517 transitions. [2021-05-02 20:33:42,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:33:42,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1517 transitions. [2021-05-02 20:33:42,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 20:33:42,780 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:42,780 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 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, 1] [2021-05-02 20:33:42,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:42,993 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:42,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1747863324, now seen corresponding path program 1 times [2021-05-02 20:33:42,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:42,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64091839] [2021-05-02 20:33:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:42,998 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:42,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635140710] [2021-05-02 20:33:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:43,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 20:33:43,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:43,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 20:33:43,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:43,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64091839] [2021-05-02 20:33:43,554 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:43,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635140710] [2021-05-02 20:33:43,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635140710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:43,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:43,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:33:43,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997920025] [2021-05-02 20:33:43,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:33:43,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:43,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:33:43,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:33:43,556 INFO L87 Difference]: Start difference. First operand 1108 states and 1517 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:44,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:44,291 INFO L93 Difference]: Finished difference Result 1178 states and 1611 transitions. [2021-05-02 20:33:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:33:44,294 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 81 [2021-05-02 20:33:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:44,298 INFO L225 Difference]: With dead ends: 1178 [2021-05-02 20:33:44,298 INFO L226 Difference]: Without dead ends: 1177 [2021-05-02 20:33:44,298 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 465.1ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-02 20:33:44,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-05-02 20:33:44,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1162. [2021-05-02 20:33:44,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 798 states have (on average 1.2907268170426065) internal successors, (1030), 805 states have internal predecessors, (1030), 283 states have call successors, (283), 81 states have call predecessors, (283), 80 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2021-05-02 20:33:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1592 transitions. [2021-05-02 20:33:44,323 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1592 transitions. Word has length 81 [2021-05-02 20:33:44,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:44,324 INFO L480 AbstractCegarLoop]: Abstraction has 1162 states and 1592 transitions. [2021-05-02 20:33:44,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1592 transitions. [2021-05-02 20:33:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:33:44,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:44,325 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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 20:33:44,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 20:33:44,549 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:44,549 INFO L82 PathProgramCache]: Analyzing trace with hash 572886209, now seen corresponding path program 1 times [2021-05-02 20:33:44,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:44,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354693652] [2021-05-02 20:33:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:44,554 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:44,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851898918] [2021-05-02 20:33:44,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:44,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:33:44,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:44,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:44,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:44,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354693652] [2021-05-02 20:33:44,813 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:44,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851898918] [2021-05-02 20:33:44,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851898918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:44,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:44,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:33:44,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510920537] [2021-05-02 20:33:44,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:33:44,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:44,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:33:44,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:44,814 INFO L87 Difference]: Start difference. First operand 1162 states and 1592 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:45,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:45,009 INFO L93 Difference]: Finished difference Result 1168 states and 1593 transitions. [2021-05-02 20:33:45,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:33:45,009 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-02 20:33:45,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:45,014 INFO L225 Difference]: With dead ends: 1168 [2021-05-02 20:33:45,014 INFO L226 Difference]: Without dead ends: 1168 [2021-05-02 20:33:45,014 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:33:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-05-02 20:33:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1162. [2021-05-02 20:33:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 798 states have (on average 1.2882205513784462) internal successors, (1028), 805 states have internal predecessors, (1028), 283 states have call successors, (283), 81 states have call predecessors, (283), 80 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2021-05-02 20:33:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1590 transitions. [2021-05-02 20:33:45,039 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1590 transitions. Word has length 87 [2021-05-02 20:33:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:45,039 INFO L480 AbstractCegarLoop]: Abstraction has 1162 states and 1590 transitions. [2021-05-02 20:33:45,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1590 transitions. [2021-05-02 20:33:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 20:33:45,040 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:45,041 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:33:45,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:45,257 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:45,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:45,258 INFO L82 PathProgramCache]: Analyzing trace with hash -2091636203, now seen corresponding path program 2 times [2021-05-02 20:33:45,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:45,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019722210] [2021-05-02 20:33:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:45,262 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:45,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212891756] [2021-05-02 20:33:45,263 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:45,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:45,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:45,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:33:45,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:45,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-02 20:33:45,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:45,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019722210] [2021-05-02 20:33:45,521 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:45,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212891756] [2021-05-02 20:33:45,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212891756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:45,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:45,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:33:45,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326191487] [2021-05-02 20:33:45,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:33:45,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:45,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:33:45,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:45,522 INFO L87 Difference]: Start difference. First operand 1162 states and 1590 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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 20:33:45,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:45,771 INFO L93 Difference]: Finished difference Result 1201 states and 1640 transitions. [2021-05-02 20:33:45,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:33:45,772 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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 90 [2021-05-02 20:33:45,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:45,776 INFO L225 Difference]: With dead ends: 1201 [2021-05-02 20:33:45,776 INFO L226 Difference]: Without dead ends: 1201 [2021-05-02 20:33:45,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:33:45,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-05-02 20:33:45,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1177. [2021-05-02 20:33:45,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 807 states have (on average 1.2862453531598512) internal successors, (1038), 814 states have internal predecessors, (1038), 287 states have call successors, (287), 83 states have call predecessors, (287), 82 states have return successors, (283), 279 states have call predecessors, (283), 283 states have call successors, (283) [2021-05-02 20:33:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1608 transitions. [2021-05-02 20:33:45,817 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1608 transitions. Word has length 90 [2021-05-02 20:33:45,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:45,817 INFO L480 AbstractCegarLoop]: Abstraction has 1177 states and 1608 transitions. [2021-05-02 20:33:45,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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 20:33:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1608 transitions. [2021-05-02 20:33:45,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 20:33:45,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:45,818 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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 20:33:46,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 20:33:46,041 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:46,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:46,042 INFO L82 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 2 times [2021-05-02 20:33:46,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:46,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987927613] [2021-05-02 20:33:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:46,050 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:46,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243574188] [2021-05-02 20:33:46,050 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:46,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:46,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:46,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 101 conjunts are in the unsatisfiable core [2021-05-02 20:33:46,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:46,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 51 proven. 42 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-05-02 20:33:46,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:46,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987927613] [2021-05-02 20:33:46,980 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:46,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243574188] [2021-05-02 20:33:46,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243574188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:46,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:46,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 20:33:46,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115230369] [2021-05-02 20:33:46,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 20:33:46,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:46,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 20:33:46,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:33:46,982 INFO L87 Difference]: Start difference. First operand 1177 states and 1608 transitions. Second operand has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 20:33:48,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:48,013 INFO L93 Difference]: Finished difference Result 1265 states and 1733 transitions. [2021-05-02 20:33:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:33:48,014 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 88 [2021-05-02 20:33:48,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:48,019 INFO L225 Difference]: With dead ends: 1265 [2021-05-02 20:33:48,019 INFO L226 Difference]: Without dead ends: 1264 [2021-05-02 20:33:48,019 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 816.9ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-05-02 20:33:48,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-05-02 20:33:48,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1243. [2021-05-02 20:33:48,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 845 states have (on average 1.2899408284023668) internal successors, (1090), 853 states have internal predecessors, (1090), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 20:33:48,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1708 transitions. [2021-05-02 20:33:48,045 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1708 transitions. Word has length 88 [2021-05-02 20:33:48,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:48,046 INFO L480 AbstractCegarLoop]: Abstraction has 1243 states and 1708 transitions. [2021-05-02 20:33:48,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 20:33:48,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1708 transitions. [2021-05-02 20:33:48,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 20:33:48,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:48,047 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-05-02 20:33:48,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:48,269 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:48,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:48,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1734422414, now seen corresponding path program 2 times [2021-05-02 20:33:48,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:48,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134354062] [2021-05-02 20:33:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:48,276 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:48,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360236097] [2021-05-02 20:33:48,277 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:48,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:48,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:48,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:33:48,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:48,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:48,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:48,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134354062] [2021-05-02 20:33:48,600 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:48,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360236097] [2021-05-02 20:33:48,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360236097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:48,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:48,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:33:48,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745208956] [2021-05-02 20:33:48,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:33:48,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:48,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:33:48,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:48,602 INFO L87 Difference]: Start difference. First operand 1243 states and 1708 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:48,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:48,857 INFO L93 Difference]: Finished difference Result 1273 states and 1735 transitions. [2021-05-02 20:33:48,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:33:48,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2021-05-02 20:33:48,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:48,862 INFO L225 Difference]: With dead ends: 1273 [2021-05-02 20:33:48,863 INFO L226 Difference]: Without dead ends: 1273 [2021-05-02 20:33:48,863 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:33:48,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-05-02 20:33:48,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1254. [2021-05-02 20:33:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 856 states have (on average 1.286214953271028) internal successors, (1101), 864 states have internal predecessors, (1101), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 20:33:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1719 transitions. [2021-05-02 20:33:48,891 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1719 transitions. Word has length 91 [2021-05-02 20:33:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:48,892 INFO L480 AbstractCegarLoop]: Abstraction has 1254 states and 1719 transitions. [2021-05-02 20:33:48,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:48,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1719 transitions. [2021-05-02 20:33:48,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 20:33:48,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:48,893 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 2, 2, 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] [2021-05-02 20:33:49,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 20:33:49,113 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:49,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:49,113 INFO L82 PathProgramCache]: Analyzing trace with hash 292128969, now seen corresponding path program 1 times [2021-05-02 20:33:49,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:49,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128845466] [2021-05-02 20:33:49,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:49,118 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:49,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850857064] [2021-05-02 20:33:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:49,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:33:49,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:49,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:49,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:49,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128845466] [2021-05-02 20:33:49,398 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:49,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850857064] [2021-05-02 20:33:49,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850857064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:49,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:49,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:33:49,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684605906] [2021-05-02 20:33:49,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:33:49,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:49,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:33:49,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:49,400 INFO L87 Difference]: Start difference. First operand 1254 states and 1719 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:49,652 INFO L93 Difference]: Finished difference Result 1280 states and 1741 transitions. [2021-05-02 20:33:49,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:33:49,653 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2021-05-02 20:33:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:49,658 INFO L225 Difference]: With dead ends: 1280 [2021-05-02 20:33:49,658 INFO L226 Difference]: Without dead ends: 1280 [2021-05-02 20:33:49,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:33:49,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-05-02 20:33:49,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1274. [2021-05-02 20:33:49,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 876 states have (on average 1.278538812785388) internal successors, (1120), 884 states have internal predecessors, (1120), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 20:33:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1738 transitions. [2021-05-02 20:33:49,685 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1738 transitions. Word has length 93 [2021-05-02 20:33:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:49,685 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 1738 transitions. [2021-05-02 20:33:49,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1738 transitions. [2021-05-02 20:33:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:33:49,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:49,687 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 20:33:49,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 20:33:49,893 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:49,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:49,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1848812608, now seen corresponding path program 2 times [2021-05-02 20:33:49,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:49,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378180395] [2021-05-02 20:33:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:49,898 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:49,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90043355] [2021-05-02 20:33:49,899 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:49,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:49,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:49,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:33:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:49,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-05-02 20:33:50,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:50,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378180395] [2021-05-02 20:33:50,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:50,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90043355] [2021-05-02 20:33:50,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90043355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:50,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:50,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:33:50,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712342265] [2021-05-02 20:33:50,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:33:50,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:50,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:33:50,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:50,211 INFO L87 Difference]: Start difference. First operand 1274 states and 1738 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:33:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:50,868 INFO L93 Difference]: Finished difference Result 1569 states and 2212 transitions. [2021-05-02 20:33:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 20:33:50,868 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 97 [2021-05-02 20:33:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:50,875 INFO L225 Difference]: With dead ends: 1569 [2021-05-02 20:33:50,875 INFO L226 Difference]: Without dead ends: 1569 [2021-05-02 20:33:50,875 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 330.7ms TimeCoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 20:33:50,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-05-02 20:33:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1310. [2021-05-02 20:33:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 894 states have (on average 1.2818791946308725) internal successors, (1146), 902 states have internal predecessors, (1146), 327 states have call successors, (327), 89 states have call predecessors, (327), 88 states have return successors, (323), 318 states have call predecessors, (323), 323 states have call successors, (323) [2021-05-02 20:33:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1796 transitions. [2021-05-02 20:33:50,905 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1796 transitions. Word has length 97 [2021-05-02 20:33:50,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:50,906 INFO L480 AbstractCegarLoop]: Abstraction has 1310 states and 1796 transitions. [2021-05-02 20:33:50,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:33:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1796 transitions. [2021-05-02 20:33:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:33:50,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:50,907 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-05-02 20:33:51,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:51,129 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:51,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2096647522, now seen corresponding path program 3 times [2021-05-02 20:33:51,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:51,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131565175] [2021-05-02 20:33:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:51,134 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:51,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969004443] [2021-05-02 20:33:51,135 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:51,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:33:51,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:51,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:33:51,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:51,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:51,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:51,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131565175] [2021-05-02 20:33:51,456 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:51,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969004443] [2021-05-02 20:33:51,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969004443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:51,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:51,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:33:51,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947583843] [2021-05-02 20:33:51,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:33:51,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:51,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:33:51,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:51,458 INFO L87 Difference]: Start difference. First operand 1310 states and 1796 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:51,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:51,745 INFO L93 Difference]: Finished difference Result 1524 states and 2039 transitions. [2021-05-02 20:33:51,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 20:33:51,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2021-05-02 20:33:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:51,751 INFO L225 Difference]: With dead ends: 1524 [2021-05-02 20:33:51,752 INFO L226 Difference]: Without dead ends: 1524 [2021-05-02 20:33:51,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:33:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-05-02 20:33:51,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1466. [2021-05-02 20:33:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 986 states have (on average 1.268762677484787) internal successors, (1251), 995 states have internal predecessors, (1251), 368 states have call successors, (368), 112 states have call predecessors, (368), 111 states have return successors, (363), 358 states have call predecessors, (363), 363 states have call successors, (363) [2021-05-02 20:33:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 1982 transitions. [2021-05-02 20:33:51,779 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 1982 transitions. Word has length 97 [2021-05-02 20:33:51,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:51,780 INFO L480 AbstractCegarLoop]: Abstraction has 1466 states and 1982 transitions. [2021-05-02 20:33:51,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 1982 transitions. [2021-05-02 20:33:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:33:51,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:51,781 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:52,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:52,005 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:52,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:52,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1189405093, now seen corresponding path program 4 times [2021-05-02 20:33:52,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:52,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082834450] [2021-05-02 20:33:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:52,010 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:52,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406106917] [2021-05-02 20:33:52,010 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:52,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:33:52,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:52,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 20:33:52,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:52,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,662 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-02 20:33:52,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 33 proven. 61 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 20:33:52,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:52,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082834450] [2021-05-02 20:33:52,986 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:52,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406106917] [2021-05-02 20:33:52,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406106917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:52,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:52,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 20:33:52,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814361011] [2021-05-02 20:33:52,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 20:33:52,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:52,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 20:33:52,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:33:52,988 INFO L87 Difference]: Start difference. First operand 1466 states and 1982 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:33:53,814 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-02 20:33:54,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:54,396 INFO L93 Difference]: Finished difference Result 1529 states and 2075 transitions. [2021-05-02 20:33:54,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:33:54,397 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 97 [2021-05-02 20:33:54,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:54,412 INFO L225 Difference]: With dead ends: 1529 [2021-05-02 20:33:54,412 INFO L226 Difference]: Without dead ends: 1529 [2021-05-02 20:33:54,413 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1140.9ms TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-05-02 20:33:54,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-05-02 20:33:54,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1507. [2021-05-02 20:33:54,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1010 states have (on average 1.2742574257425743) internal successors, (1287), 1019 states have internal predecessors, (1287), 384 states have call successors, (384), 113 states have call predecessors, (384), 112 states have return successors, (379), 374 states have call predecessors, (379), 379 states have call successors, (379) [2021-05-02 20:33:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2050 transitions. [2021-05-02 20:33:54,440 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2050 transitions. Word has length 97 [2021-05-02 20:33:54,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:54,441 INFO L480 AbstractCegarLoop]: Abstraction has 1507 states and 2050 transitions. [2021-05-02 20:33:54,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:33:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2050 transitions. [2021-05-02 20:33:54,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 20:33:54,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:54,442 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2021-05-02 20:33:54,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:54,657 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:54,657 INFO L82 PathProgramCache]: Analyzing trace with hash 672019267, now seen corresponding path program 3 times [2021-05-02 20:33:54,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:54,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740453659] [2021-05-02 20:33:54,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:54,665 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:54,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105370650] [2021-05-02 20:33:54,666 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:54,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:33:54,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:54,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 20:33:54,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:54,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 120 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:55,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:55,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740453659] [2021-05-02 20:33:55,009 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:55,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105370650] [2021-05-02 20:33:55,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105370650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:55,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:55,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:33:55,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914014511] [2021-05-02 20:33:55,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:33:55,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:55,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:33:55,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:33:55,011 INFO L87 Difference]: Start difference. First operand 1507 states and 2050 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:55,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:55,333 INFO L93 Difference]: Finished difference Result 1836 states and 2451 transitions. [2021-05-02 20:33:55,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 20:33:55,333 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 98 [2021-05-02 20:33:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:55,339 INFO L225 Difference]: With dead ends: 1836 [2021-05-02 20:33:55,340 INFO L226 Difference]: Without dead ends: 1836 [2021-05-02 20:33:55,340 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:33:55,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2021-05-02 20:33:55,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1737. [2021-05-02 20:33:55,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1161 states have (on average 1.2609819121447028) internal successors, (1464), 1186 states have internal predecessors, (1464), 442 states have call successors, (442), 134 states have call predecessors, (442), 133 states have return successors, (436), 416 states have call predecessors, (436), 436 states have call successors, (436) [2021-05-02 20:33:55,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2342 transitions. [2021-05-02 20:33:55,374 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2342 transitions. Word has length 98 [2021-05-02 20:33:55,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:55,374 INFO L480 AbstractCegarLoop]: Abstraction has 1737 states and 2342 transitions. [2021-05-02 20:33:55,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2342 transitions. [2021-05-02 20:33:55,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 20:33:55,376 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:55,376 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-05-02 20:33:55,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 20:33:55,593 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:55,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:55,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1115053491, now seen corresponding path program 1 times [2021-05-02 20:33:55,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:55,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602014451] [2021-05-02 20:33:55,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:55,601 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:55,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490812354] [2021-05-02 20:33:55,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:55,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:33:55,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:55,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 31 proven. 25 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-05-02 20:33:55,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:55,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602014451] [2021-05-02 20:33:55,940 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:55,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490812354] [2021-05-02 20:33:55,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490812354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:55,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:55,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:33:55,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879310479] [2021-05-02 20:33:55,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:33:55,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:55,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:33:55,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:33:55,945 INFO L87 Difference]: Start difference. First operand 1737 states and 2342 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:33:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:56,469 INFO L93 Difference]: Finished difference Result 2045 states and 2818 transitions. [2021-05-02 20:33:56,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 20:33:56,470 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 101 [2021-05-02 20:33:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:56,481 INFO L225 Difference]: With dead ends: 2045 [2021-05-02 20:33:56,481 INFO L226 Difference]: Without dead ends: 2045 [2021-05-02 20:33:56,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 351.4ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-05-02 20:33:56,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-05-02 20:33:56,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1881. [2021-05-02 20:33:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1224 states have (on average 1.2679738562091503) internal successors, (1552), 1266 states have internal predecessors, (1552), 518 states have call successors, (518), 139 states have call predecessors, (518), 138 states have return successors, (512), 475 states have call predecessors, (512), 512 states have call successors, (512) [2021-05-02 20:33:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2582 transitions. [2021-05-02 20:33:56,545 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2582 transitions. Word has length 101 [2021-05-02 20:33:56,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:56,546 INFO L480 AbstractCegarLoop]: Abstraction has 1881 states and 2582 transitions. [2021-05-02 20:33:56,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:33:56,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2582 transitions. [2021-05-02 20:33:56,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 20:33:56,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:56,548 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 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 20:33:56,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:56,772 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:56,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:56,772 INFO L82 PathProgramCache]: Analyzing trace with hash 114401441, now seen corresponding path program 1 times [2021-05-02 20:33:56,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:56,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244926996] [2021-05-02 20:33:56,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:56,778 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:56,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503227372] [2021-05-02 20:33:56,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:56,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:33:56,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:56,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 103 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:33:57,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:57,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244926996] [2021-05-02 20:33:57,081 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:57,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503227372] [2021-05-02 20:33:57,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503227372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:57,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:57,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:33:57,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614818358] [2021-05-02 20:33:57,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:33:57,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:57,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:33:57,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:57,083 INFO L87 Difference]: Start difference. First operand 1881 states and 2582 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:57,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:57,400 INFO L93 Difference]: Finished difference Result 1891 states and 2569 transitions. [2021-05-02 20:33:57,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 20:33:57,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 99 [2021-05-02 20:33:57,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:57,410 INFO L225 Difference]: With dead ends: 1891 [2021-05-02 20:33:57,411 INFO L226 Difference]: Without dead ends: 1891 [2021-05-02 20:33:57,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:33:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-05-02 20:33:57,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1877. [2021-05-02 20:33:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1220 states have (on average 1.2532786885245901) internal successors, (1529), 1262 states have internal predecessors, (1529), 518 states have call successors, (518), 139 states have call predecessors, (518), 138 states have return successors, (512), 475 states have call predecessors, (512), 512 states have call successors, (512) [2021-05-02 20:33:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 2559 transitions. [2021-05-02 20:33:57,449 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 2559 transitions. Word has length 99 [2021-05-02 20:33:57,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:57,450 INFO L480 AbstractCegarLoop]: Abstraction has 1877 states and 2559 transitions. [2021-05-02 20:33:57,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:33:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 2559 transitions. [2021-05-02 20:33:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 20:33:57,451 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:57,451 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:57,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:57,675 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:57,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:57,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1944004338, now seen corresponding path program 3 times [2021-05-02 20:33:57,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:57,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890121390] [2021-05-02 20:33:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:57,681 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:57,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945134247] [2021-05-02 20:33:57,681 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:57,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:33:57,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:57,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 20:33:57,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:57,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:57,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-05-02 20:33:58,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:58,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890121390] [2021-05-02 20:33:58,359 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:58,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945134247] [2021-05-02 20:33:58,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945134247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:58,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:58,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:33:58,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669401264] [2021-05-02 20:33:58,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:33:58,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:58,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:33:58,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:33:58,361 INFO L87 Difference]: Start difference. First operand 1877 states and 2559 transitions. Second operand has 15 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:34:01,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:01,112 INFO L93 Difference]: Finished difference Result 2069 states and 2850 transitions. [2021-05-02 20:34:01,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:34:01,112 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 104 [2021-05-02 20:34:01,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:01,113 INFO L225 Difference]: With dead ends: 2069 [2021-05-02 20:34:01,113 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:34:01,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 572.0ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:34:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:34:01,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:34:01,113 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 20:34:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:34:01,114 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2021-05-02 20:34:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:01,114 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:34:01,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:34:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:34:01,114 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:34:01,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 20:34:01,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:34:01 BasicIcfg [2021-05-02 20:34:01,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:34:01,333 INFO L168 Benchmark]: Toolchain (without parser) took 43069.71 ms. Allocated memory was 197.1 MB in the beginning and 494.9 MB in the end (delta: 297.8 MB). Free memory was 162.7 MB in the beginning and 316.1 MB in the end (delta: -153.4 MB). Peak memory consumption was 145.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:01,333 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 197.1 MB. Free memory is still 179.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:34:01,333 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.51 ms. Allocated memory is still 197.1 MB. Free memory was 162.5 MB in the beginning and 180.3 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:01,333 INFO L168 Benchmark]: Boogie Preprocessor took 40.58 ms. Allocated memory is still 197.1 MB. Free memory was 180.3 MB in the beginning and 178.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:01,334 INFO L168 Benchmark]: RCFGBuilder took 314.04 ms. Allocated memory is still 197.1 MB. Free memory was 178.8 MB in the beginning and 161.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:01,334 INFO L168 Benchmark]: IcfgTransformer took 18.17 ms. Allocated memory is still 197.1 MB. Free memory was 161.0 MB in the beginning and 159.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:01,334 INFO L168 Benchmark]: TraceAbstraction took 42392.15 ms. Allocated memory was 197.1 MB in the beginning and 494.9 MB in the end (delta: 297.8 MB). Free memory was 159.3 MB in the beginning and 316.1 MB in the end (delta: -156.8 MB). Peak memory consumption was 142.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:01,334 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 197.1 MB. Free memory is still 179.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 296.51 ms. Allocated memory is still 197.1 MB. Free memory was 162.5 MB in the beginning and 180.3 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.58 ms. Allocated memory is still 197.1 MB. Free memory was 180.3 MB in the beginning and 178.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 314.04 ms. Allocated memory is still 197.1 MB. Free memory was 178.8 MB in the beginning and 161.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 18.17 ms. Allocated memory is still 197.1 MB. Free memory was 161.0 MB in the beginning and 159.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 42392.15 ms. Allocated memory was 197.1 MB in the beginning and 494.9 MB in the end (delta: 297.8 MB). Free memory was 159.3 MB in the beginning and 316.1 MB in the end (delta: -156.8 MB). Peak memory consumption was 142.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 42350.1ms, OverallIterations: 45, TraceHistogramMax: 13, EmptinessCheckTime: 76.1ms, AutomataDifference: 17689.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2785 SDtfs, 4012 SDslu, 14015 SDs, 0 SdLazy, 10556 SolverSat, 2295 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 9461.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3047 GetRequests, 2371 SyntacticMatches, 5 SemanticMatches, 671 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 9523.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1881occurred in iteration=43, InterpolantAutomatonStates: 624, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 845.2ms AutomataMinimizationTime, 45 MinimizatonAttempts, 1825 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 535.3ms SsaConstructionTime, 1364.2ms SatisfiabilityAnalysisTime, 10534.5ms InterpolantComputationTime, 2802 NumberOfCodeBlocks, 2661 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 2757 ConstructedInterpolants, 0 QuantifiedInterpolants, 14440 SizeOfPredicates, 279 NumberOfNonLiveVariables, 10359 ConjunctsInSsa, 1093 ConjunctsInUnsatCore, 45 InterpolantComputations, 9 PerfectInterpolantSequences, 2753/3873 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...