/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/egcd2-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:25:35,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:25:35,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:25:35,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:25:35,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:25:35,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:25:35,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:25:35,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:25:35,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:25:35,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:25:35,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:25:35,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:25:35,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:25:35,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:25:35,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:25:35,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:25:35,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:25:35,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:25:35,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:25:35,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:25:35,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:25:35,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:25:35,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:25:35,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:25:35,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:25:35,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:25:35,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:25:35,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:25:35,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:25:35,294 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:25:35,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:25:35,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:25:35,296 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:25:35,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:25:35,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:25:35,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:25:35,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:25:35,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:25:35,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:25:35,297 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:25:35,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:25:35,297 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:25:35,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:25:35,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:25:35,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:25:35,297 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:25:35,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:25:35,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:25:35,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:25:35,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:25:35,299 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:25:35,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:25:35,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:25:35,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:25:35,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:25:35,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:25:35,628 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:25:35,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound2.c [2021-05-02 20:25:35,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e481d8dfb/08cbf996ea0c433e8c9a45bebd2a358c/FLAG4d2ece311 [2021-05-02 20:25:36,083 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:25:36,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound2.c [2021-05-02 20:25:36,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e481d8dfb/08cbf996ea0c433e8c9a45bebd2a358c/FLAG4d2ece311 [2021-05-02 20:25:36,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e481d8dfb/08cbf996ea0c433e8c9a45bebd2a358c [2021-05-02 20:25:36,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:25:36,122 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:25:36,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:25:36,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:25:36,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:25:36,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:25:36" (1/1) ... [2021-05-02 20:25:36,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf4e3a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:25:36, skipping insertion in model container [2021-05-02 20:25:36,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:25:36" (1/1) ... [2021-05-02 20:25:36,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:25:36,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:25:36,252 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/egcd2-ll_valuebound2.c[490,503] [2021-05-02 20:25:36,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:25:36,276 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:25:36,285 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/egcd2-ll_valuebound2.c[490,503] [2021-05-02 20:25:36,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:25:36,361 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:25:36,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:25:36 WrapperNode [2021-05-02 20:25:36,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:25:36,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:25:36,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:25:36,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:25:36,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:25:36" (1/1) ... [2021-05-02 20:25:36,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:25:36" (1/1) ... [2021-05-02 20:25:36,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:25:36" (1/1) ... [2021-05-02 20:25:36,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:25:36" (1/1) ... [2021-05-02 20:25:36,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:25:36" (1/1) ... [2021-05-02 20:25:36,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:25:36" (1/1) ... [2021-05-02 20:25:36,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:25:36" (1/1) ... [2021-05-02 20:25:36,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:25:36,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:25:36,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:25:36,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:25:36,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:25:36" (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 20:25:36,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:25:36,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:25:36,485 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:25:36,485 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:25:36,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:25:36,485 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:25:36,485 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:25:36,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:25:36,486 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:25:36,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:25:36,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:25:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:25:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:25:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:25:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:25:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:25:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:25:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:25:36,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:25:36,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:25:36,786 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:25:36,787 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:25:36,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:25:36 BoogieIcfgContainer [2021-05-02 20:25:36,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:25:36,805 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:25:36,805 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:25:36,806 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:25:36,809 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:25:36" (1/1) ... [2021-05-02 20:25:36,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:25:36 BasicIcfg [2021-05-02 20:25:36,829 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:25:36,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:25:36,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:25:36,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:25:36,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:25:36" (1/4) ... [2021-05-02 20:25:36,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c305723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:25:36, skipping insertion in model container [2021-05-02 20:25:36,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:25:36" (2/4) ... [2021-05-02 20:25:36,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c305723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:25:36, skipping insertion in model container [2021-05-02 20:25:36,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:25:36" (3/4) ... [2021-05-02 20:25:36,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c305723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:25:36, skipping insertion in model container [2021-05-02 20:25:36,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:25:36" (4/4) ... [2021-05-02 20:25:36,841 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound2.cJordan [2021-05-02 20:25:36,845 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:25:36,851 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:25:36,865 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:25:36,893 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:25:36,893 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:25:36,894 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:25:36,894 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:25:36,894 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:25:36,894 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:25:36,894 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:25:36,894 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:25:36,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 20:25:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:25:36,926 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:36,926 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 20:25:36,927 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:36,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:36,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2021-05-02 20:25:36,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:36,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533929226] [2021-05-02 20:25:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:37,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:25:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:37,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:25:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:37,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:25:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:37,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:25:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:37,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:25:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:37,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 20:25:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:37,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 20:25:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:25:37,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:37,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533929226] [2021-05-02 20:25:37,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533929226] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:25:37,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:25:37,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:25:37,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234692025] [2021-05-02 20:25:37,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:25:37,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:37,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:25:37,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:25:37,176 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:25:37,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:37,289 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-02 20:25:37,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:25:37,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 20:25:37,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:37,297 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:25:37,297 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:25:37,298 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:25:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:25:37,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:25:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:25:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 20:25:37,328 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-02 20:25:37,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:37,328 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 20:25:37,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:25:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 20:25:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 20:25:37,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:37,330 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 20:25:37,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:25:37,330 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:37,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:37,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2021-05-02 20:25:37,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:37,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756606541] [2021-05-02 20:25:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:37,352 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:37,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414487902] [2021-05-02 20:25:37,353 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 20:25:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:37,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:25:37,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:37,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:37,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:37,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:37,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:37,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 20:25:37,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:37,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756606541] [2021-05-02 20:25:37,622 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:37,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414487902] [2021-05-02 20:25:37,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414487902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:37,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:37,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:25:37,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318366943] [2021-05-02 20:25:37,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:25:37,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:37,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:25:37,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:25:37,625 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:25:37,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:37,735 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-02 20:25:37,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:25:37,736 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-02 20:25:37,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:37,737 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:25:37,737 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:25:37,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:25:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:25:37,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 20:25:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:25:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 20:25:37,745 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-02 20:25:37,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:37,746 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 20:25:37,746 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:25:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 20:25:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:25:37,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:37,747 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 20:25:37,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:25:37,969 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:37,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:37,970 INFO L82 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2021-05-02 20:25:37,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:37,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477580530] [2021-05-02 20:25:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:37,999 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:38,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083421027] [2021-05-02 20:25:38,000 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 20:25:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:38,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:25:38,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:38,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:25:38,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:38,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477580530] [2021-05-02 20:25:38,289 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:38,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083421027] [2021-05-02 20:25:38,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083421027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:38,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:38,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:25:38,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390280798] [2021-05-02 20:25:38,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:25:38,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:38,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:25:38,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:25:38,296 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:25:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:38,461 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-05-02 20:25:38,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:25:38,462 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2021-05-02 20:25:38,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:38,465 INFO L225 Difference]: With dead ends: 55 [2021-05-02 20:25:38,465 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 20:25:38,466 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:25:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 20:25:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-02 20:25:38,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:25:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-02 20:25:38,483 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-02 20:25:38,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:38,484 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-02 20:25:38,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:25:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-02 20:25:38,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:25:38,487 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:38,487 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 20:25:38,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:25:38,697 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:38,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:38,698 INFO L82 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2021-05-02 20:25:38,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:38,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938431865] [2021-05-02 20:25:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:38,734 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:38,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923863070] [2021-05-02 20:25:38,734 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 20:25:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:38,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:25:38,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:38,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:38,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:25:39,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:39,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938431865] [2021-05-02 20:25:39,149 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:39,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923863070] [2021-05-02 20:25:39,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923863070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:39,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:39,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:25:39,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595135337] [2021-05-02 20:25:39,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:25:39,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:39,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:25:39,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:25:39,151 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 20:25:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:39,284 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-02 20:25:39,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:25:39,285 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 50 [2021-05-02 20:25:39,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:39,290 INFO L225 Difference]: With dead ends: 54 [2021-05-02 20:25:39,290 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 20:25:39,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:25:39,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 20:25:39,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 20:25:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:25:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-02 20:25:39,308 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-02 20:25:39,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:39,308 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-02 20:25:39,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 20:25:39,308 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-02 20:25:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:25:39,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:39,313 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 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 20:25:39,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:25:39,517 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:39,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:39,517 INFO L82 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2021-05-02 20:25:39,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:39,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222100943] [2021-05-02 20:25:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:39,530 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:39,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103648900] [2021-05-02 20:25:39,530 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 20:25:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:39,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:25:39,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:39,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 20:25:39,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:39,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222100943] [2021-05-02 20:25:39,841 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:39,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103648900] [2021-05-02 20:25:39,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103648900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:39,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:39,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:25:39,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891380819] [2021-05-02 20:25:39,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:25:39,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:39,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:25:39,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:25:39,842 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:25:39,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:39,996 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-05-02 20:25:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:25:39,997 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-02 20:25:39,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:39,998 INFO L225 Difference]: With dead ends: 58 [2021-05-02 20:25:39,998 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:25:39,998 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:25:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:25:40,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 20:25:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:25:40,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-02 20:25:40,004 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-02 20:25:40,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:40,005 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-02 20:25:40,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:25:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-02 20:25:40,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 20:25:40,006 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:40,006 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:25:40,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:25:40,228 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:40,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2021-05-02 20:25:40,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:40,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915591690] [2021-05-02 20:25:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:40,241 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:40,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420021149] [2021-05-02 20:25:40,241 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 20:25:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:40,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:25:40,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:40,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-05-02 20:25:40,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:40,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915591690] [2021-05-02 20:25:40,536 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:40,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420021149] [2021-05-02 20:25:40,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420021149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:40,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:40,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:25:40,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840924208] [2021-05-02 20:25:40,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:25:40,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:40,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:25:40,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:25:40,541 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:25:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:42,813 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-02 20:25:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:25:42,813 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 60 [2021-05-02 20:25:42,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:42,818 INFO L225 Difference]: With dead ends: 62 [2021-05-02 20:25:42,818 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 20:25:42,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:25:42,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 20:25:42,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 20:25:42,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:25:42,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-02 20:25:42,824 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-02 20:25:42,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:42,825 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-02 20:25:42,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:25:42,825 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-02 20:25:42,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 20:25:42,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:42,826 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1] [2021-05-02 20:25:43,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:25:43,042 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:43,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:43,043 INFO L82 PathProgramCache]: Analyzing trace with hash 14033329, now seen corresponding path program 1 times [2021-05-02 20:25:43,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:43,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856255322] [2021-05-02 20:25:43,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:43,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:43,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583642493] [2021-05-02 20:25:43,054 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 20:25:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:43,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:25:43,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:43,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 20:25:43,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:43,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856255322] [2021-05-02 20:25:43,282 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:43,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583642493] [2021-05-02 20:25:43,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583642493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:43,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:43,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:25:43,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249928629] [2021-05-02 20:25:43,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:25:43,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:43,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:25:43,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:25:43,283 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:25:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:43,432 INFO L93 Difference]: Finished difference Result 89 states and 120 transitions. [2021-05-02 20:25:43,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:25:43,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2021-05-02 20:25:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:43,434 INFO L225 Difference]: With dead ends: 89 [2021-05-02 20:25:43,434 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 20:25:43,434 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:25:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 20:25:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-05-02 20:25:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 45 states have internal predecessors, (48), 28 states have call successors, (28), 9 states have call predecessors, (28), 8 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 20:25:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 20:25:43,454 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 67 [2021-05-02 20:25:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:43,454 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 20:25:43,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:25:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 20:25:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:25:43,456 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:43,456 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2021-05-02 20:25:43,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:25:43,670 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:43,671 INFO L82 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2021-05-02 20:25:43,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:43,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901888639] [2021-05-02 20:25:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:43,685 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:43,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322897042] [2021-05-02 20:25:43,685 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 20:25:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:43,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:25:43,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:43,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 20:25:43,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:43,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901888639] [2021-05-02 20:25:43,925 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:43,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322897042] [2021-05-02 20:25:43,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322897042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:43,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:43,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:25:43,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944031777] [2021-05-02 20:25:43,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:25:43,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:43,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:25:43,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:25:43,927 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:25:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:44,088 INFO L93 Difference]: Finished difference Result 116 states and 163 transitions. [2021-05-02 20:25:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:25:44,088 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 20:25:44,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:44,090 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:25:44,091 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:25:44,091 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:25:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:25:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2021-05-02 20:25:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 59 states have internal predecessors, (65), 41 states have call successors, (41), 9 states have call predecessors, (41), 8 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 20:25:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 145 transitions. [2021-05-02 20:25:44,110 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 145 transitions. Word has length 69 [2021-05-02 20:25:44,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:44,110 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 145 transitions. [2021-05-02 20:25:44,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:25:44,110 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 145 transitions. [2021-05-02 20:25:44,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:25:44,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:44,111 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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] [2021-05-02 20:25:44,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:25:44,317 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:44,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:44,318 INFO L82 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2021-05-02 20:25:44,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:44,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075896653] [2021-05-02 20:25:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:44,327 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:44,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500359751] [2021-05-02 20:25:44,327 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 20:25:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:44,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:25:44,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:44,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-05-02 20:25:44,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:44,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075896653] [2021-05-02 20:25:44,684 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:44,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500359751] [2021-05-02 20:25:44,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500359751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:44,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:44,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:25:44,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043001947] [2021-05-02 20:25:44,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:25:44,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:44,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:25:44,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:25:44,688 INFO L87 Difference]: Start difference. First operand 105 states and 145 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:25:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:44,935 INFO L93 Difference]: Finished difference Result 148 states and 211 transitions. [2021-05-02 20:25:44,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:25:44,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2021-05-02 20:25:44,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:44,938 INFO L225 Difference]: With dead ends: 148 [2021-05-02 20:25:44,938 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 20:25:44,939 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:25:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 20:25:44,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-05-02 20:25:44,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 81 states have internal predecessors, (89), 60 states have call successors, (60), 10 states have call predecessors, (60), 9 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 20:25:44,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 206 transitions. [2021-05-02 20:25:44,953 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 206 transitions. Word has length 75 [2021-05-02 20:25:44,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:44,954 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 206 transitions. [2021-05-02 20:25:44,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:25:44,954 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 206 transitions. [2021-05-02 20:25:44,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:25:44,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:44,955 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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] [2021-05-02 20:25:45,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:25:45,169 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:45,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:45,169 INFO L82 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2021-05-02 20:25:45,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:45,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008859057] [2021-05-02 20:25:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:45,185 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:45,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185285501] [2021-05-02 20:25:45,186 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 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 20:25:45,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:25:45,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:25:45,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 20:25:45,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:45,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-02 20:25:45,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:45,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008859057] [2021-05-02 20:25:45,499 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:45,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185285501] [2021-05-02 20:25:45,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185285501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:45,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:45,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:25:45,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827452462] [2021-05-02 20:25:45,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:25:45,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:45,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:25:45,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:25:45,501 INFO L87 Difference]: Start difference. First operand 144 states and 206 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:25:45,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:45,744 INFO L93 Difference]: Finished difference Result 150 states and 211 transitions. [2021-05-02 20:25:45,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:25:45,744 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-02 20:25:45,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:45,746 INFO L225 Difference]: With dead ends: 150 [2021-05-02 20:25:45,746 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 20:25:45,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:25:45,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 20:25:45,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-05-02 20:25:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 84 states have internal predecessors, (92), 60 states have call successors, (60), 11 states have call predecessors, (60), 10 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 20:25:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2021-05-02 20:25:45,754 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 80 [2021-05-02 20:25:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:45,755 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2021-05-02 20:25:45,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:25:45,755 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2021-05-02 20:25:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 20:25:45,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:45,756 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1, 1] [2021-05-02 20:25:45,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:25:45,978 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:45,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:45,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2021-05-02 20:25:45,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:45,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97163281] [2021-05-02 20:25:45,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:45,990 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:45,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472322604] [2021-05-02 20:25:45,990 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 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 20:25:46,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:25:46,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:25:46,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 20:25:46,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:46,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-05-02 20:25:46,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:46,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97163281] [2021-05-02 20:25:46,465 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:46,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472322604] [2021-05-02 20:25:46,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472322604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:46,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:46,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:25:46,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143626597] [2021-05-02 20:25:46,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:25:46,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:46,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:25:46,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:25:46,466 INFO L87 Difference]: Start difference. First operand 148 states and 209 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:25:46,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:46,855 INFO L93 Difference]: Finished difference Result 154 states and 214 transitions. [2021-05-02 20:25:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:25:46,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-02 20:25:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:46,857 INFO L225 Difference]: With dead ends: 154 [2021-05-02 20:25:46,857 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 20:25:46,857 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 272.6ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:25:46,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 20:25:46,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-05-02 20:25:46,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 80 states have (on average 1.1875) internal successors, (95), 87 states have internal predecessors, (95), 60 states have call successors, (60), 12 states have call predecessors, (60), 11 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 20:25:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 212 transitions. [2021-05-02 20:25:46,865 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 212 transitions. Word has length 85 [2021-05-02 20:25:46,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:46,865 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 212 transitions. [2021-05-02 20:25:46,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:25:46,865 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 212 transitions. [2021-05-02 20:25:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:25:46,866 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:46,866 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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] [2021-05-02 20:25:47,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:25:47,088 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:47,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:47,089 INFO L82 PathProgramCache]: Analyzing trace with hash 583225195, now seen corresponding path program 2 times [2021-05-02 20:25:47,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:47,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477871626] [2021-05-02 20:25:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:47,099 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:47,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979565139] [2021-05-02 20:25:47,099 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 20:25:47,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:25:47,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:25:47,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:25:47,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:47,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,527 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 33 proven. 38 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-05-02 20:25:47,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:47,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477871626] [2021-05-02 20:25:47,527 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:47,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979565139] [2021-05-02 20:25:47,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979565139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:47,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:47,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:25:47,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78789758] [2021-05-02 20:25:47,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:25:47,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:47,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:25:47,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:25:47,529 INFO L87 Difference]: Start difference. First operand 152 states and 212 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:25:47,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:47,904 INFO L93 Difference]: Finished difference Result 165 states and 226 transitions. [2021-05-02 20:25:47,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:25:47,905 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 89 [2021-05-02 20:25:47,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:47,906 INFO L225 Difference]: With dead ends: 165 [2021-05-02 20:25:47,906 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 20:25:47,906 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:25:47,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 20:25:47,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-05-02 20:25:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 93 states have internal predecessors, (102), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:25:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 225 transitions. [2021-05-02 20:25:47,916 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 225 transitions. Word has length 89 [2021-05-02 20:25:47,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:47,916 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 225 transitions. [2021-05-02 20:25:47,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:25:47,916 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 225 transitions. [2021-05-02 20:25:47,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 20:25:47,917 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:47,917 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2021-05-02 20:25:48,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:25:48,133 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:48,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:48,133 INFO L82 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2021-05-02 20:25:48,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:48,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059248954] [2021-05-02 20:25:48,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:48,141 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:48,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026719173] [2021-05-02 20:25:48,141 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 20:25:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:48,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 20:25:48,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:48,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-05-02 20:25:48,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:48,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059248954] [2021-05-02 20:25:48,624 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:48,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026719173] [2021-05-02 20:25:48,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026719173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:48,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:48,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:25:48,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764336135] [2021-05-02 20:25:48,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:25:48,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:48,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:25:48,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:25:48,626 INFO L87 Difference]: Start difference. First operand 164 states and 225 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:25:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:49,050 INFO L93 Difference]: Finished difference Result 172 states and 232 transitions. [2021-05-02 20:25:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:25:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 91 [2021-05-02 20:25:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:49,052 INFO L225 Difference]: With dead ends: 172 [2021-05-02 20:25:49,052 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 20:25:49,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:25:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 20:25:49,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-05-02 20:25:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 87 states have (on average 1.160919540229885) internal successors, (101), 93 states have internal predecessors, (101), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:25:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 224 transitions. [2021-05-02 20:25:49,059 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 224 transitions. Word has length 91 [2021-05-02 20:25:49,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:49,059 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 224 transitions. [2021-05-02 20:25:49,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:25:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 224 transitions. [2021-05-02 20:25:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 20:25:49,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:49,061 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 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] [2021-05-02 20:25:49,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:25:49,273 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:49,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1735983139, now seen corresponding path program 4 times [2021-05-02 20:25:49,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:49,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720226789] [2021-05-02 20:25:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:49,290 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:49,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636350694] [2021-05-02 20:25:49,291 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 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 20:25:49,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:25:49,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:25:49,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:25:49,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:49,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-02 20:25:49,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:49,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720226789] [2021-05-02 20:25:49,493 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:49,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636350694] [2021-05-02 20:25:49,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636350694] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:25:49,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:25:49,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:25:49,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113852437] [2021-05-02 20:25:49,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:25:49,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:49,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:25:49,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:25:49,494 INFO L87 Difference]: Start difference. First operand 164 states and 224 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 20:25:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:49,552 INFO L93 Difference]: Finished difference Result 147 states and 192 transitions. [2021-05-02 20:25:49,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:25:49,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2021-05-02 20:25:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:49,554 INFO L225 Difference]: With dead ends: 147 [2021-05-02 20:25:49,554 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 20:25:49,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:25:49,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 20:25:49,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 138. [2021-05-02 20:25:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 79 states have internal predecessors, (81), 50 states have call successors, (50), 14 states have call predecessors, (50), 13 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 20:25:49,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 178 transitions. [2021-05-02 20:25:49,560 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 178 transitions. Word has length 100 [2021-05-02 20:25:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:49,560 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 178 transitions. [2021-05-02 20:25:49,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 20:25:49,560 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 178 transitions. [2021-05-02 20:25:49,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 20:25:49,561 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:49,561 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:25:49,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:25:49,777 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:49,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:49,777 INFO L82 PathProgramCache]: Analyzing trace with hash -966740615, now seen corresponding path program 2 times [2021-05-02 20:25:49,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:49,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656913298] [2021-05-02 20:25:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:49,785 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:49,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276202294] [2021-05-02 20:25:49,785 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 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 20:25:49,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:25:49,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:25:49,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 20:25:49,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:49,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:49,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:50,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:52,347 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-02 20:25:52,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:52,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 75 proven. 65 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-05-02 20:25:52,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:52,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656913298] [2021-05-02 20:25:52,467 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:52,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276202294] [2021-05-02 20:25:52,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276202294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:52,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:52,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:25:52,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984536863] [2021-05-02 20:25:52,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:25:52,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:52,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:25:52,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:25:52,470 INFO L87 Difference]: Start difference. First operand 138 states and 178 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 20:25:53,069 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-05-02 20:25:55,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:55,266 INFO L93 Difference]: Finished difference Result 147 states and 185 transitions. [2021-05-02 20:25:55,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:25:55,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 113 [2021-05-02 20:25:55,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:55,267 INFO L225 Difference]: With dead ends: 147 [2021-05-02 20:25:55,267 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 20:25:55,268 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2569.9ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:25:55,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 20:25:55,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-05-02 20:25:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 80 states have (on average 1.075) internal successors, (86), 84 states have internal predecessors, (86), 49 states have call successors, (49), 16 states have call predecessors, (49), 15 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 20:25:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 182 transitions. [2021-05-02 20:25:55,273 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 182 transitions. Word has length 113 [2021-05-02 20:25:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:55,273 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 182 transitions. [2021-05-02 20:25:55,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 20:25:55,273 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 182 transitions. [2021-05-02 20:25:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 20:25:55,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:55,275 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 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] [2021-05-02 20:25:55,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:25:55,475 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:55,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:55,476 INFO L82 PathProgramCache]: Analyzing trace with hash 559736794, now seen corresponding path program 1 times [2021-05-02 20:25:55,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:55,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057199897] [2021-05-02 20:25:55,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:55,483 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:55,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060957466] [2021-05-02 20:25:55,483 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 20:25:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:25:55,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 20:25:55,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:55,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 38 proven. 39 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-05-02 20:25:55,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:55,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057199897] [2021-05-02 20:25:55,999 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:55,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060957466] [2021-05-02 20:25:55,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060957466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:55,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:55,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:25:55,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28321007] [2021-05-02 20:25:55,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:25:55,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:56,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:25:56,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:25:56,000 INFO L87 Difference]: Start difference. First operand 145 states and 182 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 20:25:56,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:56,495 INFO L93 Difference]: Finished difference Result 177 states and 226 transitions. [2021-05-02 20:25:56,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:25:56,495 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 114 [2021-05-02 20:25:56,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:56,496 INFO L225 Difference]: With dead ends: 177 [2021-05-02 20:25:56,496 INFO L226 Difference]: Without dead ends: 177 [2021-05-02 20:25:56,497 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 383.5ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-05-02 20:25:56,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-02 20:25:56,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2021-05-02 20:25:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 90 states have internal predecessors, (92), 52 states have call successors, (52), 18 states have call predecessors, (52), 17 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 20:25:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 194 transitions. [2021-05-02 20:25:56,502 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 194 transitions. Word has length 114 [2021-05-02 20:25:56,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:56,503 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 194 transitions. [2021-05-02 20:25:56,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 20:25:56,503 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 194 transitions. [2021-05-02 20:25:56,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 20:25:56,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:56,504 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-05-02 20:25:56,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:25:56,719 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:56,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:56,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1431100670, now seen corresponding path program 2 times [2021-05-02 20:25:56,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:56,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825138467] [2021-05-02 20:25:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:56,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:56,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987597082] [2021-05-02 20:25:56,726 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 20:25:56,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:25:56,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:25:56,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:25:56,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:56,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:56,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 183 proven. 35 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-05-02 20:25:57,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:57,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825138467] [2021-05-02 20:25:57,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:57,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987597082] [2021-05-02 20:25:57,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987597082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:57,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:57,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:25:57,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491368134] [2021-05-02 20:25:57,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:25:57,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:57,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:25:57,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:25:57,118 INFO L87 Difference]: Start difference. First operand 157 states and 194 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-02 20:25:57,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:57,387 INFO L93 Difference]: Finished difference Result 139 states and 166 transitions. [2021-05-02 20:25:57,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:25:57,388 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 129 [2021-05-02 20:25:57,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:57,389 INFO L225 Difference]: With dead ends: 139 [2021-05-02 20:25:57,389 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 20:25:57,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:25:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 20:25:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 20:25:57,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 65 states have internal predecessors, (66), 35 states have call successors, (35), 14 states have call predecessors, (35), 13 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 20:25:57,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2021-05-02 20:25:57,393 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 129 [2021-05-02 20:25:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:57,394 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2021-05-02 20:25:57,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-02 20:25:57,394 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2021-05-02 20:25:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 20:25:57,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:57,395 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-05-02 20:25:57,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:25:57,609 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:57,609 INFO L82 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 3 times [2021-05-02 20:25:57,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:57,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288684548] [2021-05-02 20:25:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:57,621 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:57,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946235477] [2021-05-02 20:25:57,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:25:57,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:25:57,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:25:57,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-02 20:25:57,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:57,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:57,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,468 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 20:25:58,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,925 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-02 20:25:58,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:58,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:01,205 WARN L205 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-02 20:26:01,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:01,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:01,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 137 proven. 79 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2021-05-02 20:26:01,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:01,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288684548] [2021-05-02 20:26:01,386 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:01,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946235477] [2021-05-02 20:26:01,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946235477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:01,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:01,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 20:26:01,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817076703] [2021-05-02 20:26:01,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 20:26:01,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:01,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 20:26:01,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:26:01,388 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 18 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 20:26:02,346 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-02 20:26:04,573 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-02 20:26:04,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:04,812 INFO L93 Difference]: Finished difference Result 136 states and 169 transitions. [2021-05-02 20:26:04,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 20:26:04,813 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 18 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) Word has length 138 [2021-05-02 20:26:04,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:04,814 INFO L225 Difference]: With dead ends: 136 [2021-05-02 20:26:04,814 INFO L226 Difference]: Without dead ends: 136 [2021-05-02 20:26:04,814 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 6064.8ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-05-02 20:26:04,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-02 20:26:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2021-05-02 20:26:04,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 78 states have internal predecessors, (79), 45 states have call successors, (45), 15 states have call predecessors, (45), 14 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-02 20:26:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 167 transitions. [2021-05-02 20:26:04,819 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 167 transitions. Word has length 138 [2021-05-02 20:26:04,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:04,819 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 167 transitions. [2021-05-02 20:26:04,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 18 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 20:26:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 167 transitions. [2021-05-02 20:26:04,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 20:26:04,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:04,820 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-05-02 20:26:05,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:26:05,029 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1199073726, now seen corresponding path program 1 times [2021-05-02 20:26:05,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:05,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709164588] [2021-05-02 20:26:05,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:05,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:05,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777511339] [2021-05-02 20:26:05,054 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 20:26:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:05,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 20:26:05,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:05,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 59 proven. 123 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-05-02 20:26:05,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:05,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709164588] [2021-05-02 20:26:05,798 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:05,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777511339] [2021-05-02 20:26:05,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777511339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:05,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:05,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:26:05,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198539175] [2021-05-02 20:26:05,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 20:26:05,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:05,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 20:26:05,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:26:05,800 INFO L87 Difference]: Start difference. First operand 134 states and 167 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 20:26:06,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:06,561 INFO L93 Difference]: Finished difference Result 140 states and 172 transitions. [2021-05-02 20:26:06,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:26:06,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 143 [2021-05-02 20:26:06,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:06,563 INFO L225 Difference]: With dead ends: 140 [2021-05-02 20:26:06,563 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 20:26:06,563 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 556.1ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-05-02 20:26:06,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 20:26:06,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-05-02 20:26:06,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 77 states have (on average 1.051948051948052) internal successors, (81), 80 states have internal predecessors, (81), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2021-05-02 20:26:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 167 transitions. [2021-05-02 20:26:06,568 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 167 transitions. Word has length 143 [2021-05-02 20:26:06,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:06,568 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 167 transitions. [2021-05-02 20:26:06,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 20:26:06,568 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 167 transitions. [2021-05-02 20:26:06,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 20:26:06,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:06,569 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 20:26:06,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:26:06,785 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:06,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:06,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1866948721, now seen corresponding path program 3 times [2021-05-02 20:26:06,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:06,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538438359] [2021-05-02 20:26:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:06,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:06,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155037139] [2021-05-02 20:26:06,796 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 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 20:26:06,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:26:06,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:26:06,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-02 20:26:06,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:06,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:06,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:06,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:06,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:06,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:06,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:06,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:06,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 144 proven. 68 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2021-05-02 20:26:07,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:07,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538438359] [2021-05-02 20:26:07,626 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:07,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155037139] [2021-05-02 20:26:07,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155037139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:07,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:07,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:26:07,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828564406] [2021-05-02 20:26:07,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:26:07,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:07,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:26:07,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:26:07,628 INFO L87 Difference]: Start difference. First operand 137 states and 167 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-02 20:26:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:24,345 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2021-05-02 20:26:24,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:26:24,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 154 [2021-05-02 20:26:24,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:24,346 INFO L225 Difference]: With dead ends: 146 [2021-05-02 20:26:24,347 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 20:26:24,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 488.4ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:26:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 20:26:24,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-05-02 20:26:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 86 states have internal predecessors, (87), 44 states have call successors, (44), 18 states have call predecessors, (44), 17 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2021-05-02 20:26:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 173 transitions. [2021-05-02 20:26:24,361 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 173 transitions. Word has length 154 [2021-05-02 20:26:24,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:24,361 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 173 transitions. [2021-05-02 20:26:24,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-02 20:26:24,361 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 173 transitions. [2021-05-02 20:26:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-05-02 20:26:24,362 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:24,362 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 24, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 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 20:26:24,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:26:24,585 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:24,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1902258775, now seen corresponding path program 4 times [2021-05-02 20:26:24,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:24,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774160947] [2021-05-02 20:26:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:24,593 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:24,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143178546] [2021-05-02 20:26:24,593 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 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 20:26:24,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:26:24,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:26:24,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 20:26:24,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:24,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:24,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:25,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1321 backedges. 625 proven. 33 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2021-05-02 20:26:25,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:25,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774160947] [2021-05-02 20:26:25,107 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:25,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143178546] [2021-05-02 20:26:25,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143178546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:25,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:25,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:26:25,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384283490] [2021-05-02 20:26:25,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:26:25,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:25,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:26:25,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:26:25,108 INFO L87 Difference]: Start difference. First operand 145 states and 173 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2021-05-02 20:26:25,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:25,531 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2021-05-02 20:26:25,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:26:25,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) Word has length 183 [2021-05-02 20:26:25,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:25,532 INFO L225 Difference]: With dead ends: 86 [2021-05-02 20:26:25,532 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:26:25,532 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 309.8ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:26:25,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:26:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:26:25,532 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 20:26:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:26:25,533 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 183 [2021-05-02 20:26:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:25,533 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:26:25,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2021-05-02 20:26:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:26:25,533 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:26:25,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 20:26:25,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:26:25 BasicIcfg [2021-05-02 20:26:25,737 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:26:25,737 INFO L168 Benchmark]: Toolchain (without parser) took 49615.29 ms. Allocated memory was 179.3 MB in the beginning and 264.2 MB in the end (delta: 84.9 MB). Free memory was 145.1 MB in the beginning and 216.1 MB in the end (delta: -70.9 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:26:25,737 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 179.3 MB. Free memory is still 161.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:26:25,737 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.14 ms. Allocated memory is still 179.3 MB. Free memory was 144.9 MB in the beginning and 162.9 MB in the end (delta: -17.9 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:26:25,737 INFO L168 Benchmark]: Boogie Preprocessor took 39.03 ms. Allocated memory is still 179.3 MB. Free memory was 162.9 MB in the beginning and 161.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:26:25,738 INFO L168 Benchmark]: RCFGBuilder took 384.25 ms. Allocated memory is still 179.3 MB. Free memory was 161.3 MB in the beginning and 144.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:26:25,738 INFO L168 Benchmark]: IcfgTransformer took 24.38 ms. Allocated memory is still 179.3 MB. Free memory was 144.0 MB in the beginning and 142.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:26:25,738 INFO L168 Benchmark]: TraceAbstraction took 48906.17 ms. Allocated memory was 179.3 MB in the beginning and 264.2 MB in the end (delta: 84.9 MB). Free memory was 141.9 MB in the beginning and 216.1 MB in the end (delta: -74.2 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. [2021-05-02 20:26:25,739 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 179.3 MB. Free memory is still 161.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 236.14 ms. Allocated memory is still 179.3 MB. Free memory was 144.9 MB in the beginning and 162.9 MB in the end (delta: -17.9 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.03 ms. Allocated memory is still 179.3 MB. Free memory was 162.9 MB in the beginning and 161.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 384.25 ms. Allocated memory is still 179.3 MB. Free memory was 161.3 MB in the beginning and 144.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 24.38 ms. Allocated memory is still 179.3 MB. Free memory was 144.0 MB in the beginning and 142.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 48906.17 ms. Allocated memory was 179.3 MB in the beginning and 264.2 MB in the end (delta: 84.9 MB). Free memory was 141.9 MB in the beginning and 216.1 MB in the end (delta: -74.2 MB). Peak memory consumption was 12.3 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: 48842.9ms, OverallIterations: 21, TraceHistogramMax: 25, EmptinessCheckTime: 44.5ms, AutomataDifference: 29981.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 943 SDtfs, 698 SDslu, 4963 SDs, 0 SdLazy, 5792 SolverSat, 739 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 24135.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1989 GetRequests, 1668 SyntacticMatches, 7 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 12217.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=12, InterpolantAutomatonStates: 251, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 191.7ms AutomataMinimizationTime, 21 MinimizatonAttempts, 85 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 223.4ms SsaConstructionTime, 690.2ms SatisfiabilityAnalysisTime, 12507.0ms InterpolantComputationTime, 1927 NumberOfCodeBlocks, 1752 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1906 ConstructedInterpolants, 0 QuantifiedInterpolants, 10175 SizeOfPredicates, 144 NumberOfNonLiveVariables, 5064 ConjunctsInSsa, 741 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 5682/6378 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...