/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/fermat1-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:34:51,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:34:51,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:34:51,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:34:51,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:34:51,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:34:51,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:34:51,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:34:51,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:34:51,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:34:51,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:34:51,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:34:51,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:34:51,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:34:51,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:34:51,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:34:51,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:34:51,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:34:51,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:34:51,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:34:51,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:34:51,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:34:51,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:34:51,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:34:51,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:34:51,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:34:51,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:34:51,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:34:51,227 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:34:51,243 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:34:51,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:34:51,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:34:51,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:34:51,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:34:51,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:34:51,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:34:51,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:34:51,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:34:51,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:34:51,248 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:34:51,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:34:51,248 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:34:51,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:34:51,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:34:51,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:34:51,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:34:51,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:34:51,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:34:51,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:34:51,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:34:51,251 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:34:51,251 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:34:51,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:34:51,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:34:51,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:34:51,562 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:34:51,563 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:34:51,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound100.c [2021-05-02 20:34:51,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25bd62cd6/98cb544191184ba4bb0175d89e71f41a/FLAGf4a44c769 [2021-05-02 20:34:52,046 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:34:52,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound100.c [2021-05-02 20:34:52,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25bd62cd6/98cb544191184ba4bb0175d89e71f41a/FLAGf4a44c769 [2021-05-02 20:34:52,456 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25bd62cd6/98cb544191184ba4bb0175d89e71f41a [2021-05-02 20:34:52,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:34:52,464 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:34:52,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:34:52,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:34:52,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:34:52,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:34:52" (1/1) ... [2021-05-02 20:34:52,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2588c909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:52, skipping insertion in model container [2021-05-02 20:34:52,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:34:52" (1/1) ... [2021-05-02 20:34:52,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:34:52,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:34:52,595 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/fermat1-ll_valuebound100.c[535,548] [2021-05-02 20:34:52,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:34:52,616 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:34:52,637 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/fermat1-ll_valuebound100.c[535,548] [2021-05-02 20:34:52,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:34:52,662 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:34:52,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:52 WrapperNode [2021-05-02 20:34:52,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:34:52,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:34:52,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:34:52,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:34:52,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:52" (1/1) ... [2021-05-02 20:34:52,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:52" (1/1) ... [2021-05-02 20:34:52,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:52" (1/1) ... [2021-05-02 20:34:52,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:52" (1/1) ... [2021-05-02 20:34:52,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:52" (1/1) ... [2021-05-02 20:34:52,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:52" (1/1) ... [2021-05-02 20:34:52,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:52" (1/1) ... [2021-05-02 20:34:52,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:34:52,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:34:52,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:34:52,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:34:52,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:52" (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 20:34:52,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:34:52,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:34:52,756 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:34:52,756 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:34:52,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:34:52,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:34:52,756 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:34:52,757 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:34:52,757 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:34:52,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:34:52,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:34:52,757 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:34:52,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:34:52,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:34:52,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:34:52,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:34:52,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:34:52,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:34:52,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:34:52,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:34:53,078 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:34:53,078 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:34:53,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:53 BoogieIcfgContainer [2021-05-02 20:34:53,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:34:53,080 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:34:53,080 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:34:53,081 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:34:53,083 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:53" (1/1) ... [2021-05-02 20:34:53,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:34:53 BasicIcfg [2021-05-02 20:34:53,099 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:34:53,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:34:53,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:34:53,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:34:53,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:34:52" (1/4) ... [2021-05-02 20:34:53,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c9fce73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:34:53, skipping insertion in model container [2021-05-02 20:34:53,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:52" (2/4) ... [2021-05-02 20:34:53,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c9fce73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:34:53, skipping insertion in model container [2021-05-02 20:34:53,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:53" (3/4) ... [2021-05-02 20:34:53,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c9fce73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:34:53, skipping insertion in model container [2021-05-02 20:34:53,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:34:53" (4/4) ... [2021-05-02 20:34:53,109 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_valuebound100.cJordan [2021-05-02 20:34:53,113 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:34:53,116 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:34:53,128 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:34:53,142 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:34:53,142 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:34:53,142 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:34:53,142 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:34:53,142 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:34:53,142 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:34:53,142 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:34:53,142 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:34:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:34:53,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:34:53,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:53,160 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:53,160 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:53,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1042421720, now seen corresponding path program 1 times [2021-05-02 20:34:53,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:53,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389725724] [2021-05-02 20:34:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:53,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:34:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:53,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:34:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:53,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:34:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:53,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:34:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:53,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:34:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:34:53,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:53,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389725724] [2021-05-02 20:34:53,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389725724] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:53,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:53,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:34:53,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866195966] [2021-05-02 20:34:53,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:34:53,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:53,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:34:53,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:34:53,389 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:53,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:53,474 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-05-02 20:34:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:34:53,475 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:34:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:53,481 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:34:53,481 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:34:53,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:34:53,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:34:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:34:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:34:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-05-02 20:34:53,518 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 33 [2021-05-02 20:34:53,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:53,518 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-05-02 20:34:53,518 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:53,518 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-05-02 20:34:53,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:34:53,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:53,520 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:53,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:34:53,520 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:53,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:53,521 INFO L82 PathProgramCache]: Analyzing trace with hash 104571547, now seen corresponding path program 1 times [2021-05-02 20:34:53,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:53,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773504945] [2021-05-02 20:34:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:53,537 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:53,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935526792] [2021-05-02 20:34:53,537 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 20:34:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:53,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:34:53,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:53,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:34:53,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:53,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773504945] [2021-05-02 20:34:53,926 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:53,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935526792] [2021-05-02 20:34:53,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935526792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:53,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:53,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:34:53,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046175904] [2021-05-02 20:34:53,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:34:53,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:53,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:34:53,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:34:53,933 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:58,135 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-05-02 20:34:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:34:58,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:34:58,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:58,139 INFO L225 Difference]: With dead ends: 46 [2021-05-02 20:34:58,139 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:34:58,140 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:34:58,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:34:58,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 20:34:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:34:58,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2021-05-02 20:34:58,151 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 33 [2021-05-02 20:34:58,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:58,151 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2021-05-02 20:34:58,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:58,152 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2021-05-02 20:34:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:34:58,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:58,153 INFO L523 BasicCegarLoop]: trace histogram [4, 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] [2021-05-02 20:34:58,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:34:58,369 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash -844389750, now seen corresponding path program 1 times [2021-05-02 20:34:58,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:58,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733381734] [2021-05-02 20:34:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:58,382 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:58,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061664800] [2021-05-02 20:34:58,383 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 20:34:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:58,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:34:58,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:58,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:58,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:00,866 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 18 [2021-05-02 20:35:00,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:00,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:35:00,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:00,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733381734] [2021-05-02 20:35:00,921 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:35:00,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061664800] [2021-05-02 20:35:00,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061664800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:35:00,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:35:00,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:35:00,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687410381] [2021-05-02 20:35:00,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:35:00,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:00,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:35:00,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:35:00,924 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:35:20,633 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 20:35:30,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:35:30,827 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2021-05-02 20:35:30,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:35:30,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 20:35:30,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:35:30,830 INFO L225 Difference]: With dead ends: 61 [2021-05-02 20:35:30,831 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:35:30,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 4528.9ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:35:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:35:30,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-05-02 20:35:30,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 36 states have internal predecessors, (38), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 20:35:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-05-02 20:35:30,840 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 39 [2021-05-02 20:35:30,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:35:30,841 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-05-02 20:35:30,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:35:30,841 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-05-02 20:35:30,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:35:30,842 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:30,842 INFO L523 BasicCegarLoop]: trace histogram [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 20:35:31,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:35:31,064 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:31,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:31,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2009827732, now seen corresponding path program 1 times [2021-05-02 20:35:31,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:31,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743253031] [2021-05-02 20:35:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:31,074 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:35:31,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182521855] [2021-05-02 20:35:31,074 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 20:35:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:31,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:35:31,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:35:31,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:31,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,388 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 20:35:33,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:35:33,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:33,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743253031] [2021-05-02 20:35:33,591 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:35:33,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182521855] [2021-05-02 20:35:33,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182521855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:35:33,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:35:33,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:35:33,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975947713] [2021-05-02 20:35:33,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:35:33,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:33,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:35:33,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:35:33,595 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:35:48,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:35:48,147 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2021-05-02 20:35:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:35:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-05-02 20:35:48,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:35:48,149 INFO L225 Difference]: With dead ends: 79 [2021-05-02 20:35:48,149 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 20:35:48,149 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2171.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:35:48,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 20:35:48,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2021-05-02 20:35:48,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 50 states have internal predecessors, (53), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 14 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 20:35:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2021-05-02 20:35:48,161 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 47 [2021-05-02 20:35:48,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:35:48,162 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2021-05-02 20:35:48,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:35:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2021-05-02 20:35:48,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:35:48,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:48,163 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-05-02 20:35:48,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:35:48,364 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:48,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2016182430, now seen corresponding path program 2 times [2021-05-02 20:35:48,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:48,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16317759] [2021-05-02 20:35:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:48,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:35:48,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107928156] [2021-05-02 20:35:48,378 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 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 20:35:48,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:35:48,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:35:48,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:35:48,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:35:48,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:48,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:48,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:48,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:48,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:48,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:48,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:48,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:48,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:48,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:48,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:48,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:48,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:48,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 20:35:48,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:48,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16317759] [2021-05-02 20:35:48,718 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:35:48,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107928156] [2021-05-02 20:35:48,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107928156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:35:48,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:35:48,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:35:48,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633279707] [2021-05-02 20:35:48,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:35:48,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:48,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:35:48,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:35:48,722 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 20:35:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:35:51,756 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2021-05-02 20:35:51,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:35:51,757 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 54 [2021-05-02 20:35:51,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:35:51,758 INFO L225 Difference]: With dead ends: 111 [2021-05-02 20:35:51,758 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 20:35:51,759 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:35:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 20:35:51,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2021-05-02 20:35:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 67 states have (on average 1.164179104477612) internal successors, (78), 74 states have internal predecessors, (78), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 20 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 20:35:51,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2021-05-02 20:35:51,770 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 54 [2021-05-02 20:35:51,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:35:51,770 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2021-05-02 20:35:51,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 20:35:51,770 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2021-05-02 20:35:51,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:35:51,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:51,772 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:35:51,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:35:51,985 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:51,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:51,985 INFO L82 PathProgramCache]: Analyzing trace with hash 921696812, now seen corresponding path program 3 times [2021-05-02 20:35:51,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:51,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465631302] [2021-05-02 20:35:51,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:51,998 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:35:51,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894737728] [2021-05-02 20:35:51,999 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 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 20:35:52,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:35:52,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:35:52,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:35:52,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:35:52,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:52,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 20:35:58,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:58,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465631302] [2021-05-02 20:35:58,172 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:35:58,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894737728] [2021-05-02 20:35:58,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894737728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:35:58,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:35:58,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:35:58,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567121661] [2021-05-02 20:35:58,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:35:58,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:58,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:35:58,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=130, Unknown=1, NotChecked=0, Total=156 [2021-05-02 20:35:58,174 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:36:23,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:36:23,304 INFO L93 Difference]: Finished difference Result 189 states and 231 transitions. [2021-05-02 20:36:23,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:36:23,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 61 [2021-05-02 20:36:23,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:36:23,306 INFO L225 Difference]: With dead ends: 189 [2021-05-02 20:36:23,307 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 20:36:23,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 5966.4ms TimeCoverageRelationStatistics Valid=93, Invalid=458, Unknown=1, NotChecked=0, Total=552 [2021-05-02 20:36:23,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 20:36:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-05-02 20:36:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 125 states have (on average 1.152) internal successors, (144), 136 states have internal predecessors, (144), 44 states have call successors, (44), 20 states have call predecessors, (44), 19 states have return successors, (43), 32 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-02 20:36:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 231 transitions. [2021-05-02 20:36:23,322 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 231 transitions. Word has length 61 [2021-05-02 20:36:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:36:23,322 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 231 transitions. [2021-05-02 20:36:23,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:36:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 231 transitions. [2021-05-02 20:36:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:36:23,324 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:36:23,324 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 4, 4, 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] [2021-05-02 20:36:23,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:36:23,546 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:36:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:36:23,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1148557238, now seen corresponding path program 1 times [2021-05-02 20:36:23,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:36:23,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454914863] [2021-05-02 20:36:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:36:23,556 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:36:23,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619936506] [2021-05-02 20:36:23,556 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 20:36:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:36:23,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 20:36:23,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:36:23,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:05,892 WARN L205 SmtUtils]: Spent 40.08 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:37:05,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:05,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:11,982 WARN L205 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 20:37:12,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:12,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:18,075 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 20:37:18,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:18,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:18,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:18,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:18,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:18,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:18,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:18,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:18,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:18,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:18,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:18,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:24,458 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:37:40,458 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:37:40,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:40,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 22 proven. 38 refuted. 2 times theorem prover too weak. 54 trivial. 0 not checked. [2021-05-02 20:37:40,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:37:40,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454914863] [2021-05-02 20:37:40,537 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:37:40,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619936506] [2021-05-02 20:37:40,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619936506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:37:40,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:37:40,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:37:40,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515579204] [2021-05-02 20:37:40,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:37:40,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:37:40,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:37:40,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=163, Unknown=8, NotChecked=0, Total=210 [2021-05-02 20:37:40,539 INFO L87 Difference]: Start difference. First operand 189 states and 231 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 20:38:22,146 WARN L205 SmtUtils]: Spent 10.04 s on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 20:38:43,188 WARN L205 SmtUtils]: Spent 17.00 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-02 20:39:01,862 WARN L205 SmtUtils]: Spent 12.43 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-02 20:40:18,014 WARN L205 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 20:40:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:40:32,254 INFO L93 Difference]: Finished difference Result 269 states and 339 transitions. [2021-05-02 20:40:32,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:40:32,257 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 75 [2021-05-02 20:40:32,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:40:32,260 INFO L225 Difference]: With dead ends: 269 [2021-05-02 20:40:32,260 INFO L226 Difference]: Without dead ends: 269 [2021-05-02 20:40:32,260 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 132445.6ms TimeCoverageRelationStatistics Valid=84, Invalid=365, Unknown=13, NotChecked=0, Total=462 [2021-05-02 20:40:32,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-02 20:40:32,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 245. [2021-05-02 20:40:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 163 states have (on average 1.165644171779141) internal successors, (190), 176 states have internal predecessors, (190), 58 states have call successors, (58), 24 states have call predecessors, (58), 23 states have return successors, (57), 44 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 20:40:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 305 transitions. [2021-05-02 20:40:32,288 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 305 transitions. Word has length 75 [2021-05-02 20:40:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:40:32,288 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 305 transitions. [2021-05-02 20:40:32,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 20:40:32,289 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 305 transitions. [2021-05-02 20:40:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 20:40:32,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:40:32,291 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 4, 4, 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] [2021-05-02 20:40:32,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:40:32,513 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:40:32,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:40:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash 341788388, now seen corresponding path program 2 times [2021-05-02 20:40:32,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:40:32,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945625689] [2021-05-02 20:40:32,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:40:32,522 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:40:32,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316762812] [2021-05-02 20:40:32,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:40:32,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:40:32,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:40:32,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:40:32,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:40:32,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:32,980 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-02 20:40:32,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:40:32,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945625689] [2021-05-02 20:40:32,981 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:40:32,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316762812] [2021-05-02 20:40:32,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316762812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:40:32,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:40:32,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:40:32,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313087875] [2021-05-02 20:40:32,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:40:32,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:40:32,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:40:32,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:40:32,984 INFO L87 Difference]: Start difference. First operand 245 states and 305 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 20:40:33,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:40:33,538 INFO L93 Difference]: Finished difference Result 276 states and 348 transitions. [2021-05-02 20:40:33,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:40:33,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 82 [2021-05-02 20:40:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:40:33,542 INFO L225 Difference]: With dead ends: 276 [2021-05-02 20:40:33,542 INFO L226 Difference]: Without dead ends: 276 [2021-05-02 20:40:33,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 303.7ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:40:33,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-02 20:40:33,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2021-05-02 20:40:33,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 183 states have (on average 1.1584699453551912) internal successors, (212), 196 states have internal predecessors, (212), 68 states have call successors, (68), 24 states have call predecessors, (68), 23 states have return successors, (67), 54 states have call predecessors, (67), 67 states have call successors, (67) [2021-05-02 20:40:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 347 transitions. [2021-05-02 20:40:33,583 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 347 transitions. Word has length 82 [2021-05-02 20:40:33,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:40:33,584 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 347 transitions. [2021-05-02 20:40:33,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 20:40:33,584 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 347 transitions. [2021-05-02 20:40:33,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:40:33,590 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:40:33,590 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 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] [2021-05-02 20:40:33,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:40:33,805 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:40:33,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:40:33,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2045268700, now seen corresponding path program 1 times [2021-05-02 20:40:33,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:40:33,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018812373] [2021-05-02 20:40:33,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:40:33,823 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:40:33,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146198576] [2021-05-02 20:40:33,824 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 20:40:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:40:33,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 20:40:33,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:40:33,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:34,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 61 proven. 37 refuted. 4 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 20:40:35,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:40:35,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018812373] [2021-05-02 20:40:35,490 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:40:35,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146198576] [2021-05-02 20:40:35,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146198576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:40:35,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:40:35,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:40:35,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430254076] [2021-05-02 20:40:35,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:40:35,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:40:35,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:40:35,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=180, Unknown=1, NotChecked=0, Total=210 [2021-05-02 20:40:35,492 INFO L87 Difference]: Start difference. First operand 275 states and 347 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 20:41:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:41:26,744 INFO L93 Difference]: Finished difference Result 377 states and 480 transitions. [2021-05-02 20:41:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:41:26,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 89 [2021-05-02 20:41:26,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:41:26,747 INFO L225 Difference]: With dead ends: 377 [2021-05-02 20:41:26,747 INFO L226 Difference]: Without dead ends: 377 [2021-05-02 20:41:26,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 3281.8ms TimeCoverageRelationStatistics Valid=70, Invalid=479, Unknown=3, NotChecked=0, Total=552 [2021-05-02 20:41:26,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-02 20:41:26,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 351. [2021-05-02 20:41:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 235 states have (on average 1.1574468085106382) internal successors, (272), 252 states have internal predecessors, (272), 84 states have call successors, (84), 32 states have call predecessors, (84), 31 states have return successors, (83), 66 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-02 20:41:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 439 transitions. [2021-05-02 20:41:26,762 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 439 transitions. Word has length 89 [2021-05-02 20:41:26,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:41:26,763 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 439 transitions. [2021-05-02 20:41:26,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 20:41:26,763 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 439 transitions. [2021-05-02 20:41:26,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:41:26,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:26,765 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 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] [2021-05-02 20:41:26,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:41:26,981 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:26,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1914671820, now seen corresponding path program 2 times [2021-05-02 20:41:26,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:26,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780482892] [2021-05-02 20:41:26,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:26,988 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:26,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317410665] [2021-05-02 20:41:26,988 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 20:41:27,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:41:27,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:41:27,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:41:27,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:27,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 94 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-05-02 20:41:27,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:41:27,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780482892] [2021-05-02 20:41:27,251 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:41:27,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317410665] [2021-05-02 20:41:27,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317410665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:41:27,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:41:27,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-02 20:41:27,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94917159] [2021-05-02 20:41:27,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:41:27,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:41:27,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:41:27,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:41:27,253 INFO L87 Difference]: Start difference. First operand 351 states and 439 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:41:27,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:41:27,300 INFO L93 Difference]: Finished difference Result 361 states and 449 transitions. [2021-05-02 20:41:27,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:41:27,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 89 [2021-05-02 20:41:27,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:41:27,303 INFO L225 Difference]: With dead ends: 361 [2021-05-02 20:41:27,303 INFO L226 Difference]: Without dead ends: 361 [2021-05-02 20:41:27,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:41:27,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-05-02 20:41:27,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2021-05-02 20:41:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 246 states have (on average 1.1544715447154472) internal successors, (284), 250 states have internal predecessors, (284), 83 states have call successors, (83), 32 states have call predecessors, (83), 31 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2021-05-02 20:41:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 449 transitions. [2021-05-02 20:41:27,316 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 449 transitions. Word has length 89 [2021-05-02 20:41:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:41:27,316 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 449 transitions. [2021-05-02 20:41:27,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:41:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 449 transitions. [2021-05-02 20:41:27,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:41:27,318 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:27,319 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 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] [2021-05-02 20:41:27,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:41:27,522 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:27,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:27,523 INFO L82 PathProgramCache]: Analyzing trace with hash -842490076, now seen corresponding path program 3 times [2021-05-02 20:41:27,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:27,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988434589] [2021-05-02 20:41:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:27,537 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:27,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125025649] [2021-05-02 20:41:27,538 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 20:41:27,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:41:27,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:41:27,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:41:27,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:27,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 49 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-05-02 20:41:27,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:41:27,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988434589] [2021-05-02 20:41:27,802 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:41:27,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125025649] [2021-05-02 20:41:27,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125025649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:41:27,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:41:27,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:41:27,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423723323] [2021-05-02 20:41:27,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:41:27,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:41:27,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:41:27,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:41:27,803 INFO L87 Difference]: Start difference. First operand 361 states and 449 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-02 20:41:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:41:31,926 INFO L93 Difference]: Finished difference Result 373 states and 458 transitions. [2021-05-02 20:41:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:41:31,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2021-05-02 20:41:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:41:31,929 INFO L225 Difference]: With dead ends: 373 [2021-05-02 20:41:31,929 INFO L226 Difference]: Without dead ends: 373 [2021-05-02 20:41:31,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:41:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-02 20:41:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2021-05-02 20:41:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 255 states have (on average 1.1490196078431372) internal successors, (293), 259 states have internal predecessors, (293), 83 states have call successors, (83), 35 states have call predecessors, (83), 34 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2021-05-02 20:41:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 458 transitions. [2021-05-02 20:41:31,948 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 458 transitions. Word has length 89 [2021-05-02 20:41:31,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:41:31,948 INFO L480 AbstractCegarLoop]: Abstraction has 373 states and 458 transitions. [2021-05-02 20:41:31,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-02 20:41:31,948 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 458 transitions. [2021-05-02 20:41:31,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 20:41:31,950 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:31,950 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:41:32,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:41:32,165 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:32,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:32,165 INFO L82 PathProgramCache]: Analyzing trace with hash 352516930, now seen corresponding path program 4 times [2021-05-02 20:41:32,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:32,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942555926] [2021-05-02 20:41:32,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:32,170 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:32,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547363782] [2021-05-02 20:41:32,170 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 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 20:41:32,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:41:32,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:41:32,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 20:41:32,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:32,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:32,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:51,114 WARN L205 SmtUtils]: Spent 18.81 s on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2021-05-02 20:41:51,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:51,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:51,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:51,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,720 WARN L205 SmtUtils]: Spent 5.58 s on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 20:41:56,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:56,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,379 WARN L205 SmtUtils]: Spent 5.55 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 20:42:02,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:05,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 38 proven. 36 refuted. 6 times theorem prover too weak. 192 trivial. 0 not checked. [2021-05-02 20:42:07,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:42:07,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942555926] [2021-05-02 20:42:07,492 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:42:07,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547363782] [2021-05-02 20:42:07,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547363782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:42:07,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:42:07,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:42:07,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814269172] [2021-05-02 20:42:07,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:42:07,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:42:07,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:42:07,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=87, Unknown=2, NotChecked=0, Total=110 [2021-05-02 20:42:07,494 INFO L87 Difference]: Start difference. First operand 373 states and 458 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 20:42:18,756 WARN L205 SmtUtils]: Spent 11.14 s on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 20:45:14,698 WARN L205 SmtUtils]: Spent 11.14 s on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 20:45:23,146 WARN L205 SmtUtils]: Spent 2.99 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 20:45:23,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:23,235 INFO L93 Difference]: Finished difference Result 456 states and 581 transitions. [2021-05-02 20:45:23,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:45:23,236 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2021-05-02 20:45:23,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:23,238 INFO L225 Difference]: With dead ends: 456 [2021-05-02 20:45:23,238 INFO L226 Difference]: Without dead ends: 456 [2021-05-02 20:45:23,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 75174.4ms TimeCoverageRelationStatistics Valid=70, Invalid=265, Unknown=7, NotChecked=0, Total=342 [2021-05-02 20:45:23,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-05-02 20:45:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 391. [2021-05-02 20:45:23,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 267 states have (on average 1.1535580524344569) internal successors, (308), 271 states have internal predecessors, (308), 89 states have call successors, (89), 35 states have call predecessors, (89), 34 states have return successors, (88), 84 states have call predecessors, (88), 88 states have call successors, (88) [2021-05-02 20:45:23,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 485 transitions. [2021-05-02 20:45:23,252 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 485 transitions. Word has length 103 [2021-05-02 20:45:23,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:23,253 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 485 transitions. [2021-05-02 20:45:23,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 20:45:23,253 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 485 transitions. [2021-05-02 20:45:23,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:45:23,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:23,255 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:23,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:45:23,469 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:23,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:23,469 INFO L82 PathProgramCache]: Analyzing trace with hash -521691412, now seen corresponding path program 5 times [2021-05-02 20:45:23,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:23,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821413698] [2021-05-02 20:45:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:23,482 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:23,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619054854] [2021-05-02 20:45:23,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:45:23,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 20:45:23,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:45:23,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 20:45:23,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:23,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-05-02 20:45:23,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:23,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821413698] [2021-05-02 20:45:23,902 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:23,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619054854] [2021-05-02 20:45:23,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619054854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:23,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:23,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:45:23,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375286414] [2021-05-02 20:45:23,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:45:23,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:23,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:45:23,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:45:23,903 INFO L87 Difference]: Start difference. First operand 391 states and 485 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:45:24,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:24,310 INFO L93 Difference]: Finished difference Result 569 states and 758 transitions. [2021-05-02 20:45:24,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:45:24,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 110 [2021-05-02 20:45:24,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:24,314 INFO L225 Difference]: With dead ends: 569 [2021-05-02 20:45:24,314 INFO L226 Difference]: Without dead ends: 569 [2021-05-02 20:45:24,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:45:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-05-02 20:45:24,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 541. [2021-05-02 20:45:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 368 states have (on average 1.2092391304347827) internal successors, (445), 369 states have internal predecessors, (445), 138 states have call successors, (138), 35 states have call predecessors, (138), 34 states have return successors, (137), 136 states have call predecessors, (137), 137 states have call successors, (137) [2021-05-02 20:45:24,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 720 transitions. [2021-05-02 20:45:24,329 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 720 transitions. Word has length 110 [2021-05-02 20:45:24,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:24,330 INFO L480 AbstractCegarLoop]: Abstraction has 541 states and 720 transitions. [2021-05-02 20:45:24,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:45:24,330 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 720 transitions. [2021-05-02 20:45:24,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:45:24,331 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:24,332 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:24,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:45:24,537 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:24,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:24,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1431091588, now seen corresponding path program 6 times [2021-05-02 20:45:24,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:24,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12696141] [2021-05-02 20:45:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:24,547 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:24,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794245993] [2021-05-02 20:45:24,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:45:24,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 20:45:24,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:45:24,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 20:45:24,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:24,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:24,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:24,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:25,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:25,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:25,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:25,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:25,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:44,066 WARN L205 SmtUtils]: Spent 18.98 s on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-05-02 20:45:54,827 WARN L205 SmtUtils]: Spent 10.74 s on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 20:45:54,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:54,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12696141] [2021-05-02 20:45:54,835 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:54,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794245993] [2021-05-02 20:45:54,835 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 20:45:55,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:45:55,038 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.AbstractGeneralizedAffineTerm.toTerm(AbstractGeneralizedAffineTerm.java:279) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:436) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperSbr.solveForSubject(DualJunctionDer.java:367) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperSbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:312) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:328) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.constructQuantifiedFormula(TermDomainOperationProvider.java:114) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.modularPostconditionCall(PredicateTransformer.java:178) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:174) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:612) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-02 20:45:55,040 INFO L168 Benchmark]: Toolchain (without parser) took 662580.40 ms. Allocated memory was 206.6 MB in the beginning and 253.8 MB in the end (delta: 47.2 MB). Free memory was 171.9 MB in the beginning and 213.1 MB in the end (delta: -41.2 MB). Peak memory consumption was 6.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:45:55,041 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 206.6 MB. Free memory is still 188.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:45:55,041 INFO L168 Benchmark]: CACSL2BoogieTranslator took 190.48 ms. Allocated memory is still 206.6 MB. Free memory was 171.6 MB in the beginning and 189.8 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:45:55,041 INFO L168 Benchmark]: Boogie Preprocessor took 30.34 ms. Allocated memory is still 206.6 MB. Free memory was 189.8 MB in the beginning and 188.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:45:55,041 INFO L168 Benchmark]: RCFGBuilder took 385.19 ms. Allocated memory is still 206.6 MB. Free memory was 188.0 MB in the beginning and 172.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:45:55,041 INFO L168 Benchmark]: IcfgTransformer took 19.00 ms. Allocated memory is still 206.6 MB. Free memory was 172.2 MB in the beginning and 170.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:45:55,041 INFO L168 Benchmark]: TraceAbstraction took 661938.67 ms. Allocated memory was 206.6 MB in the beginning and 253.8 MB in the end (delta: 47.2 MB). Free memory was 170.5 MB in the beginning and 213.1 MB in the end (delta: -42.5 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2021-05-02 20:45:55,041 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 206.6 MB. Free memory is still 188.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 190.48 ms. Allocated memory is still 206.6 MB. Free memory was 171.6 MB in the beginning and 189.8 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.34 ms. Allocated memory is still 206.6 MB. Free memory was 189.8 MB in the beginning and 188.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 385.19 ms. Allocated memory is still 206.6 MB. Free memory was 188.0 MB in the beginning and 172.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 19.00 ms. Allocated memory is still 206.6 MB. Free memory was 172.2 MB in the beginning and 170.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 661938.67 ms. Allocated memory was 206.6 MB in the beginning and 253.8 MB in the end (delta: 47.2 MB). Free memory was 170.5 MB in the beginning and 213.1 MB in the end (delta: -42.5 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.AbstractGeneralizedAffineTerm.toTerm(AbstractGeneralizedAffineTerm.java:279) RESULT: Ultimate could not prove your program: Toolchain returned no result. [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...