/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:12:41,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:12:41,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:12:41,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:12:41,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:12:41,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:12:41,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:12:41,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:12:41,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:12:41,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:12:41,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:12:41,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:12:41,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:12:41,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:12:41,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:12:41,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:12:41,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:12:41,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:12:41,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:12:41,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:12:41,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:12:41,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:12:41,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:12:41,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:12:41,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:12:41,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:12:41,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:12:41,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:12:41,863 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:12:41,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:12:41,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:12:41,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:12:41,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:12:41,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:12:41,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:12:41,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:12:41,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:12:41,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:12:41,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:12:41,879 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:12:41,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:12:41,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:12:41,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:12:41,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:12:41,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:12:41,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:12:41,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:12:41,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:12:41,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:12:41,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:12:41,881 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:12:41,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:12:42,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:12:42,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:12:42,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:12:42,108 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:12:42,108 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:12:42,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound1.c [2021-05-06 07:12:42,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94dc898e8/95fbcfc7e3634937b5cf386aed34a14b/FLAG98af90d49 [2021-05-06 07:12:42,497 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:12:42,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound1.c [2021-05-06 07:12:42,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94dc898e8/95fbcfc7e3634937b5cf386aed34a14b/FLAG98af90d49 [2021-05-06 07:12:42,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94dc898e8/95fbcfc7e3634937b5cf386aed34a14b [2021-05-06 07:12:42,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:12:42,952 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:12:42,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:12:42,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:12:42,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:12:42,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:12:42" (1/1) ... [2021-05-06 07:12:42,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29166219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:42, skipping insertion in model container [2021-05-06 07:12:42,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:12:42" (1/1) ... [2021-05-06 07:12:42,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:12:42,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:12:43,046 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound1.c[596,609] [2021-05-06 07:12:43,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:12:43,063 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:12:43,071 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound1.c[596,609] [2021-05-06 07:12:43,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:12:43,086 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:12:43,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:43 WrapperNode [2021-05-06 07:12:43,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:12:43,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:12:43,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:12:43,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:12:43,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:43" (1/1) ... [2021-05-06 07:12:43,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:43" (1/1) ... [2021-05-06 07:12:43,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:43" (1/1) ... [2021-05-06 07:12:43,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:43" (1/1) ... [2021-05-06 07:12:43,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:43" (1/1) ... [2021-05-06 07:12:43,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:43" (1/1) ... [2021-05-06 07:12:43,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:43" (1/1) ... [2021-05-06 07:12:43,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:12:43,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:12:43,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:12:43,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:12:43,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:43" (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 [2021-05-06 07:12:43,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:12:43,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:12:43,195 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:12:43,195 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:12:43,195 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:12:43,196 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:12:43,196 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:12:43,196 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:12:43,196 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:12:43,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:12:43,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-06 07:12:43,196 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:12:43,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:12:43,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:12:43,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:12:43,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:12:43,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:12:43,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:12:43,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:12:43,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:12:43,430 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:12:43,431 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 07:12:43,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:12:43 BoogieIcfgContainer [2021-05-06 07:12:43,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:12:43,432 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:12:43,432 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:12:43,433 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:12:43,434 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:12:43" (1/1) ... [2021-05-06 07:12:43,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:12:43 BasicIcfg [2021-05-06 07:12:43,473 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:12:43,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:12:43,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:12:43,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:12:43,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:12:42" (1/4) ... [2021-05-06 07:12:43,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c03649e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:12:43, skipping insertion in model container [2021-05-06 07:12:43,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:43" (2/4) ... [2021-05-06 07:12:43,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c03649e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:12:43, skipping insertion in model container [2021-05-06 07:12:43,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:12:43" (3/4) ... [2021-05-06 07:12:43,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c03649e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:12:43, skipping insertion in model container [2021-05-06 07:12:43,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:12:43" (4/4) ... [2021-05-06 07:12:43,478 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound1.cJordan [2021-05-06 07:12:43,487 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:12:43,490 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:12:43,503 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:12:43,523 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:12:43,523 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:12:43,523 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:12:43,523 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:12:43,523 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:12:43,523 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:12:43,523 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:12:43,523 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:12:43,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 07:12:43,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:12:43,542 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:43,543 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:43,543 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:43,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:43,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1231486971, now seen corresponding path program 1 times [2021-05-06 07:12:43,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:43,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123527961] [2021-05-06 07:12:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:43,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:12:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:43,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:12:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:12:43,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:43,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123527961] [2021-05-06 07:12:43,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123527961] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:12:43,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:12:43,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:12:43,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234926047] [2021-05-06 07:12:43,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:12:43,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:43,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:12:43,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:12:43,750 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:12:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:43,833 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-05-06 07:12:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:12:43,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 07:12:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:43,839 INFO L225 Difference]: With dead ends: 36 [2021-05-06 07:12:43,839 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 07:12:43,840 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:12:43,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 07:12:43,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 07:12:43,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 07:12:43,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-05-06 07:12:43,861 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2021-05-06 07:12:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:43,861 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-05-06 07:12:43,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:12:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-05-06 07:12:43,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:12:43,862 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:43,862 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:43,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:12:43,862 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:43,863 INFO L82 PathProgramCache]: Analyzing trace with hash -574090659, now seen corresponding path program 1 times [2021-05-06 07:12:43,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:43,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068178360] [2021-05-06 07:12:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:43,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:12:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:43,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:12:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:12:43,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:43,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068178360] [2021-05-06 07:12:43,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068178360] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:12:43,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:12:43,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:12:43,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546639429] [2021-05-06 07:12:43,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:12:43,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:43,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:12:43,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:43,948 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:12:44,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:44,153 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-06 07:12:44,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:12:44,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 07:12:44,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:44,156 INFO L225 Difference]: With dead ends: 35 [2021-05-06 07:12:44,156 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:12:44,157 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:12:44,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:12:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 07:12:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 07:12:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 07:12:44,171 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2021-05-06 07:12:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:44,171 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 07:12:44,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:12:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 07:12:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 07:12:44,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:44,173 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:44,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 07:12:44,177 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:44,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:44,177 INFO L82 PathProgramCache]: Analyzing trace with hash 344526146, now seen corresponding path program 1 times [2021-05-06 07:12:44,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:44,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754064277] [2021-05-06 07:12:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:44,196 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:44,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448783832] [2021-05-06 07:12:44,196 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 [2021-05-06 07:12:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:44,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:12:44,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:44,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:12:44,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:44,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754064277] [2021-05-06 07:12:44,367 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:44,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448783832] [2021-05-06 07:12:44,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448783832] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:12:44,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:12:44,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:12:44,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342605108] [2021-05-06 07:12:44,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:12:44,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:44,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:12:44,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:12:44,368 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:12:44,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:44,421 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-05-06 07:12:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:12:44,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 07:12:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:44,423 INFO L225 Difference]: With dead ends: 52 [2021-05-06 07:12:44,423 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 07:12:44,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:44,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 07:12:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-05-06 07:12:44,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 07:12:44,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2021-05-06 07:12:44,427 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2021-05-06 07:12:44,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:44,427 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2021-05-06 07:12:44,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:12:44,427 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2021-05-06 07:12:44,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 07:12:44,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:44,428 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:44,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 07:12:44,640 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:44,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:44,641 INFO L82 PathProgramCache]: Analyzing trace with hash 942277242, now seen corresponding path program 1 times [2021-05-06 07:12:44,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:44,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181495291] [2021-05-06 07:12:44,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:44,653 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:44,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678743395] [2021-05-06 07:12:44,654 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 [2021-05-06 07:12:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:44,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:12:44,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:44,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:12:44,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:44,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181495291] [2021-05-06 07:12:44,795 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:44,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678743395] [2021-05-06 07:12:44,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678743395] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:12:44,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:12:44,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:12:44,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76146281] [2021-05-06 07:12:44,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:12:44,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:44,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:12:44,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:12:44,800 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:12:44,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:44,843 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-05-06 07:12:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:12:44,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 07:12:44,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:44,845 INFO L225 Difference]: With dead ends: 56 [2021-05-06 07:12:44,845 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 07:12:44,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:44,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 07:12:44,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-05-06 07:12:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 07:12:44,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-05-06 07:12:44,854 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2021-05-06 07:12:44,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:44,855 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-05-06 07:12:44,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:12:44,855 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-05-06 07:12:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 07:12:44,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:44,856 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:45,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:45,071 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:45,071 INFO L82 PathProgramCache]: Analyzing trace with hash -881201762, now seen corresponding path program 1 times [2021-05-06 07:12:45,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:45,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232649174] [2021-05-06 07:12:45,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:45,078 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:45,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134524152] [2021-05-06 07:12:45,079 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 [2021-05-06 07:12:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:45,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:12:45,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:45,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 07:12:45,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:45,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232649174] [2021-05-06 07:12:45,200 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:45,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134524152] [2021-05-06 07:12:45,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134524152] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:12:45,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:12:45,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:12:45,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626495210] [2021-05-06 07:12:45,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:12:45,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:45,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:12:45,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:12:45,204 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:12:45,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:45,259 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2021-05-06 07:12:45,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:12:45,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-06 07:12:45,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:45,261 INFO L225 Difference]: With dead ends: 64 [2021-05-06 07:12:45,261 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 07:12:45,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:45,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 07:12:45,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 07:12:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 07:12:45,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-05-06 07:12:45,265 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2021-05-06 07:12:45,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:45,265 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-05-06 07:12:45,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:12:45,265 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-05-06 07:12:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 07:12:45,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:45,266 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:45,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:45,483 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:45,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:45,483 INFO L82 PathProgramCache]: Analyzing trace with hash 72164327, now seen corresponding path program 1 times [2021-05-06 07:12:45,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:45,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856844207] [2021-05-06 07:12:45,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:45,491 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:45,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180698018] [2021-05-06 07:12:45,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:45,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:12:45,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:45,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 07:12:45,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:45,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856844207] [2021-05-06 07:12:45,618 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:45,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180698018] [2021-05-06 07:12:45,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180698018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:45,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:45,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:12:45,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124183302] [2021-05-06 07:12:45,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:12:45,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:45,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:12:45,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:45,619 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 07:12:45,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:45,700 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2021-05-06 07:12:45,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:12:45,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2021-05-06 07:12:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:45,701 INFO L225 Difference]: With dead ends: 79 [2021-05-06 07:12:45,702 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 07:12:45,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 07:12:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-05-06 07:12:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 37 states have (on average 1.054054054054054) internal successors, (39), 39 states have internal predecessors, (39), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 07:12:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2021-05-06 07:12:45,706 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 49 [2021-05-06 07:12:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:45,706 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2021-05-06 07:12:45,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 07:12:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2021-05-06 07:12:45,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 07:12:45,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:45,707 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:45,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:45,927 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:45,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:45,927 INFO L82 PathProgramCache]: Analyzing trace with hash 655575797, now seen corresponding path program 2 times [2021-05-06 07:12:45,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:45,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54891301] [2021-05-06 07:12:45,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:45,934 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:45,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200779945] [2021-05-06 07:12:45,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:45,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:12:45,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:45,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:12:45,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:46,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 07:12:46,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:46,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54891301] [2021-05-06 07:12:46,138 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:46,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200779945] [2021-05-06 07:12:46,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200779945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:46,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:46,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:12:46,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161164055] [2021-05-06 07:12:46,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:12:46,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:46,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:12:46,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:46,140 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 07:12:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:46,233 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2021-05-06 07:12:46,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:12:46,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-06 07:12:46,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:46,238 INFO L225 Difference]: With dead ends: 83 [2021-05-06 07:12:46,238 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 07:12:46,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 07:12:46,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2021-05-06 07:12:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 40 states have (on average 1.05) internal successors, (42), 42 states have internal predecessors, (42), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 07:12:46,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-05-06 07:12:46,245 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 54 [2021-05-06 07:12:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:46,245 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-05-06 07:12:46,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 07:12:46,246 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-05-06 07:12:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 07:12:46,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:46,248 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:46,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 07:12:46,457 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:46,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:46,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1963047427, now seen corresponding path program 3 times [2021-05-06 07:12:46,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:46,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141521817] [2021-05-06 07:12:46,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:46,464 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:46,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776471999] [2021-05-06 07:12:46,464 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 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 [2021-05-06 07:12:46,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 07:12:46,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:46,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 07:12:46,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:46,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:46,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:46,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:46,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:46,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:46,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:46,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:46,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:46,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 07:12:46,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:46,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141521817] [2021-05-06 07:12:46,670 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:46,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776471999] [2021-05-06 07:12:46,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776471999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:46,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:46,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:12:46,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757775524] [2021-05-06 07:12:46,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:12:46,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:46,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:12:46,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:46,672 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 07:12:46,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:46,765 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2021-05-06 07:12:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:12:46,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 59 [2021-05-06 07:12:46,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:46,767 INFO L225 Difference]: With dead ends: 87 [2021-05-06 07:12:46,767 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 07:12:46,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 07:12:46,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 07:12:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 46 states have internal predecessors, (47), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 07:12:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2021-05-06 07:12:46,773 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 59 [2021-05-06 07:12:46,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:46,774 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2021-05-06 07:12:46,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 07:12:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2021-05-06 07:12:46,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 07:12:46,774 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:46,774 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:46,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:46,977 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:46,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:46,977 INFO L82 PathProgramCache]: Analyzing trace with hash 766739444, now seen corresponding path program 4 times [2021-05-06 07:12:46,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:46,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475568434] [2021-05-06 07:12:46,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:46,984 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:46,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823794255] [2021-05-06 07:12:46,984 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 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 [2021-05-06 07:12:47,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 07:12:47,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:47,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:12:47,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:47,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 07:12:47,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:47,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475568434] [2021-05-06 07:12:47,166 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:47,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823794255] [2021-05-06 07:12:47,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823794255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:47,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:47,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:12:47,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002590440] [2021-05-06 07:12:47,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:12:47,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:47,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:12:47,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:47,168 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 07:12:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:47,234 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2021-05-06 07:12:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:12:47,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2021-05-06 07:12:47,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:47,236 INFO L225 Difference]: With dead ends: 90 [2021-05-06 07:12:47,236 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 07:12:47,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 07:12:47,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 07:12:47,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 49 states have internal predecessors, (50), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 07:12:47,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2021-05-06 07:12:47,240 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 64 [2021-05-06 07:12:47,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:47,241 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2021-05-06 07:12:47,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 07:12:47,241 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2021-05-06 07:12:47,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 07:12:47,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:47,242 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:47,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:47,449 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:47,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:47,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1897273453, now seen corresponding path program 1 times [2021-05-06 07:12:47,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:47,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070526118] [2021-05-06 07:12:47,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:47,455 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:47,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466049517] [2021-05-06 07:12:47,456 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 [2021-05-06 07:12:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:47,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 07:12:47,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:47,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 07:12:47,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:47,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070526118] [2021-05-06 07:12:47,728 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:47,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466049517] [2021-05-06 07:12:47,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466049517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:47,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:47,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:12:47,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162525630] [2021-05-06 07:12:47,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:12:47,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:47,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:12:47,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:47,729 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 07:12:47,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:47,815 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2021-05-06 07:12:47,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:12:47,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2021-05-06 07:12:47,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:47,816 INFO L225 Difference]: With dead ends: 93 [2021-05-06 07:12:47,816 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 07:12:47,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:12:47,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 07:12:47,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 07:12:47,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 50 states have (on average 1.06) internal successors, (53), 52 states have internal predecessors, (53), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 07:12:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2021-05-06 07:12:47,820 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 75 [2021-05-06 07:12:47,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:47,820 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2021-05-06 07:12:47,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 07:12:47,820 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2021-05-06 07:12:47,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 07:12:47,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:47,821 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:48,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 07:12:48,022 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:48,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:48,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2023420382, now seen corresponding path program 5 times [2021-05-06 07:12:48,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:48,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832095292] [2021-05-06 07:12:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:48,030 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:48,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870650220] [2021-05-06 07:12:48,030 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 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 [2021-05-06 07:12:48,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 07:12:48,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:48,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 07:12:48,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:48,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 39 proven. 26 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-06 07:12:48,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:48,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832095292] [2021-05-06 07:12:48,320 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:48,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870650220] [2021-05-06 07:12:48,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870650220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:48,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:48,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:12:48,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498810309] [2021-05-06 07:12:48,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:12:48,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:48,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:12:48,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:12:48,322 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 07:12:48,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:48,585 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2021-05-06 07:12:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:12:48,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 76 [2021-05-06 07:12:48,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:48,587 INFO L225 Difference]: With dead ends: 114 [2021-05-06 07:12:48,587 INFO L226 Difference]: Without dead ends: 113 [2021-05-06 07:12:48,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 07:12:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-06 07:12:48,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2021-05-06 07:12:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 60 states have internal predecessors, (60), 29 states have call successors, (29), 17 states have call predecessors, (29), 16 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 07:12:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-05-06 07:12:48,591 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 76 [2021-05-06 07:12:48,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:48,592 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-05-06 07:12:48,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 07:12:48,592 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-05-06 07:12:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 07:12:48,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:48,593 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:48,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:48,810 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:48,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:48,810 INFO L82 PathProgramCache]: Analyzing trace with hash -994112719, now seen corresponding path program 1 times [2021-05-06 07:12:48,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:48,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640266222] [2021-05-06 07:12:48,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:48,816 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:48,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309950064] [2021-05-06 07:12:48,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:48,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:12:48,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:48,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-06 07:12:49,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:49,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640266222] [2021-05-06 07:12:49,086 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:49,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309950064] [2021-05-06 07:12:49,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309950064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:49,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:49,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:12:49,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659171745] [2021-05-06 07:12:49,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:12:49,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:49,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:12:49,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:49,087 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 07:12:49,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:49,164 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2021-05-06 07:12:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:12:49,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 80 [2021-05-06 07:12:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:49,166 INFO L225 Difference]: With dead ends: 107 [2021-05-06 07:12:49,166 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 07:12:49,166 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:12:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 07:12:49,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 07:12:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.037037037037037) internal successors, (56), 56 states have internal predecessors, (56), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 07:12:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-05-06 07:12:49,170 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 80 [2021-05-06 07:12:49,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:49,171 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-05-06 07:12:49,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 07:12:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-05-06 07:12:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 07:12:49,171 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:49,171 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:49,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:49,390 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:49,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:49,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1391751782, now seen corresponding path program 6 times [2021-05-06 07:12:49,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:49,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113273534] [2021-05-06 07:12:49,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:49,396 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:49,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115614109] [2021-05-06 07:12:49,396 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 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 [2021-05-06 07:12:49,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 07:12:49,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:49,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 07:12:49,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:49,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 82 proven. 17 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-05-06 07:12:49,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:49,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113273534] [2021-05-06 07:12:49,633 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:49,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115614109] [2021-05-06 07:12:49,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115614109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:49,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:49,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 07:12:49,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942944185] [2021-05-06 07:12:49,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 07:12:49,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:49,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 07:12:49,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:12:49,634 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 07:12:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:50,150 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2021-05-06 07:12:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:12:50,151 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 81 [2021-05-06 07:12:50,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:50,151 INFO L225 Difference]: With dead ends: 110 [2021-05-06 07:12:50,151 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 07:12:50,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:12:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 07:12:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2021-05-06 07:12:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 59 states have internal predecessors, (59), 27 states have call successors, (27), 17 states have call predecessors, (27), 16 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 07:12:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-05-06 07:12:50,156 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 81 [2021-05-06 07:12:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:50,156 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-05-06 07:12:50,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 07:12:50,156 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-05-06 07:12:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 07:12:50,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:50,157 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:50,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 07:12:50,365 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:50,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:50,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1552787842, now seen corresponding path program 7 times [2021-05-06 07:12:50,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:50,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142588573] [2021-05-06 07:12:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:50,371 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:50,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549117351] [2021-05-06 07:12:50,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-06 07:12:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:50,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 07:12:50,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:50,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 26 proven. 17 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 07:12:50,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:50,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142588573] [2021-05-06 07:12:50,555 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:50,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549117351] [2021-05-06 07:12:50,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549117351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:50,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:50,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:12:50,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993478079] [2021-05-06 07:12:50,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:12:50,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:50,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:12:50,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:50,556 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 07:12:50,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:50,771 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2021-05-06 07:12:50,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:12:50,771 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 86 [2021-05-06 07:12:50,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:50,772 INFO L225 Difference]: With dead ends: 114 [2021-05-06 07:12:50,772 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 07:12:50,772 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:12:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 07:12:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 07:12:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 07:12:50,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2021-05-06 07:12:50,776 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 86 [2021-05-06 07:12:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:50,776 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2021-05-06 07:12:50,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 07:12:50,776 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2021-05-06 07:12:50,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 07:12:50,777 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:50,777 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:50,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 07:12:50,994 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:50,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:50,994 INFO L82 PathProgramCache]: Analyzing trace with hash 574631438, now seen corresponding path program 2 times [2021-05-06 07:12:50,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:50,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756673441] [2021-05-06 07:12:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:51,000 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:51,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768273245] [2021-05-06 07:12:51,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:51,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:12:51,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:51,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 07:12:51,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:51,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-05-06 07:12:51,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:51,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756673441] [2021-05-06 07:12:51,287 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:51,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768273245] [2021-05-06 07:12:51,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768273245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:51,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:51,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:12:51,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775734657] [2021-05-06 07:12:51,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:12:51,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:51,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:12:51,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:12:51,288 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 07:12:51,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:51,396 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2021-05-06 07:12:51,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:12:51,396 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2021-05-06 07:12:51,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:51,397 INFO L225 Difference]: With dead ends: 115 [2021-05-06 07:12:51,397 INFO L226 Difference]: Without dead ends: 115 [2021-05-06 07:12:51,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:12:51,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-06 07:12:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-05-06 07:12:51,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 64 states have (on average 1.046875) internal successors, (67), 66 states have internal predecessors, (67), 32 states have call successors, (32), 19 states have call predecessors, (32), 18 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 07:12:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2021-05-06 07:12:51,400 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 102 [2021-05-06 07:12:51,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:51,400 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2021-05-06 07:12:51,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 07:12:51,401 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2021-05-06 07:12:51,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 07:12:51,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:51,401 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:51,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:51,618 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:51,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:51,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1591187207, now seen corresponding path program 8 times [2021-05-06 07:12:51,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:51,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142765905] [2021-05-06 07:12:51,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:51,624 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:51,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257710370] [2021-05-06 07:12:51,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:51,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:12:51,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:51,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:12:51,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:51,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2021-05-06 07:12:51,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:51,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142765905] [2021-05-06 07:12:51,885 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:51,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257710370] [2021-05-06 07:12:51,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257710370] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:12:51,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:12:51,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:12:51,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678410154] [2021-05-06 07:12:51,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:12:51,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:51,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:12:51,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:12:51,886 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 07:12:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:51,930 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2021-05-06 07:12:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:12:51,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 103 [2021-05-06 07:12:51,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:51,931 INFO L225 Difference]: With dead ends: 102 [2021-05-06 07:12:51,931 INFO L226 Difference]: Without dead ends: 100 [2021-05-06 07:12:51,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:12:51,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-06 07:12:51,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-05-06 07:12:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 61 states have (on average 1.0) internal successors, (61), 61 states have internal predecessors, (61), 21 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 07:12:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-05-06 07:12:51,935 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 103 [2021-05-06 07:12:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:51,936 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-05-06 07:12:51,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 07:12:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-05-06 07:12:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 07:12:51,937 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:51,937 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:52,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:52,154 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:52,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:52,155 INFO L82 PathProgramCache]: Analyzing trace with hash 474519958, now seen corresponding path program 2 times [2021-05-06 07:12:52,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:52,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556405978] [2021-05-06 07:12:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:52,160 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:52,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895787307] [2021-05-06 07:12:52,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:52,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:12:52,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:52,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 07:12:52,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:52,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-05-06 07:12:52,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:52,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556405978] [2021-05-06 07:12:52,441 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:52,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895787307] [2021-05-06 07:12:52,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895787307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:52,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:52,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:12:52,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061017176] [2021-05-06 07:12:52,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:12:52,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:52,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:12:52,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:12:52,444 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-06 07:12:52,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:52,565 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-06 07:12:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:12:52,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 107 [2021-05-06 07:12:52,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:52,566 INFO L225 Difference]: With dead ends: 102 [2021-05-06 07:12:52,566 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:12:52,566 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:12:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:12:52,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:12:52,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 07:12:52,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:12:52,567 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 107 [2021-05-06 07:12:52,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:52,567 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:12:52,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-06 07:12:52,567 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:12:52,567 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:12:52,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 07:12:52,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:12:52 BasicIcfg [2021-05-06 07:12:52,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:12:52,784 INFO L168 Benchmark]: Toolchain (without parser) took 9832.40 ms. Allocated memory was 179.3 MB in the beginning and 260.0 MB in the end (delta: 80.7 MB). Free memory was 143.7 MB in the beginning and 238.5 MB in the end (delta: -94.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:12:52,784 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 179.3 MB. Free memory is still 160.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:12:52,784 INFO L168 Benchmark]: CACSL2BoogieTranslator took 133.45 ms. Allocated memory is still 179.3 MB. Free memory was 143.7 MB in the beginning and 133.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 07:12:52,784 INFO L168 Benchmark]: Boogie Preprocessor took 48.49 ms. Allocated memory is still 179.3 MB. Free memory was 133.3 MB in the beginning and 161.8 MB in the end (delta: -28.5 MB). Peak memory consumption was 2.8 MB. Max. memory is 8.0 GB. [2021-05-06 07:12:52,784 INFO L168 Benchmark]: RCFGBuilder took 295.87 ms. Allocated memory is still 179.3 MB. Free memory was 161.8 MB in the beginning and 146.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:12:52,785 INFO L168 Benchmark]: IcfgTransformer took 40.85 ms. Allocated memory is still 179.3 MB. Free memory was 146.0 MB in the beginning and 144.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:12:52,785 INFO L168 Benchmark]: TraceAbstraction took 9310.03 ms. Allocated memory was 179.3 MB in the beginning and 260.0 MB in the end (delta: 80.7 MB). Free memory was 144.5 MB in the beginning and 238.5 MB in the end (delta: -94.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:12:52,785 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 179.3 MB. Free memory is still 160.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 133.45 ms. Allocated memory is still 179.3 MB. Free memory was 143.7 MB in the beginning and 133.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.49 ms. Allocated memory is still 179.3 MB. Free memory was 133.3 MB in the beginning and 161.8 MB in the end (delta: -28.5 MB). Peak memory consumption was 2.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 295.87 ms. Allocated memory is still 179.3 MB. Free memory was 161.8 MB in the beginning and 146.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 40.85 ms. Allocated memory is still 179.3 MB. Free memory was 146.0 MB in the beginning and 144.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9310.03 ms. Allocated memory was 179.3 MB in the beginning and 260.0 MB in the end (delta: 80.7 MB). Free memory was 144.5 MB in the beginning and 238.5 MB in the end (delta: -94.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9259.9ms, OverallIterations: 17, TraceHistogramMax: 18, EmptinessCheckTime: 22.9ms, AutomataDifference: 2260.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 811 SDtfs, 142 SDslu, 2826 SDs, 0 SdLazy, 1747 SolverSat, 178 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1512.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1043 GetRequests, 938 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 708.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=15, InterpolantAutomatonStates: 113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 90.6ms AutomataMinimizationTime, 17 MinimizatonAttempts, 52 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 109.8ms SsaConstructionTime, 402.5ms SatisfiabilityAnalysisTime, 2537.6ms InterpolantComputationTime, 1051 NumberOfCodeBlocks, 1001 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1034 ConstructedInterpolants, 0 QuantifiedInterpolants, 3635 SizeOfPredicates, 30 NumberOfNonLiveVariables, 2930 ConjunctsInSsa, 265 ConjunctsInUnsatCore, 17 InterpolantComputations, 6 PerfectInterpolantSequences, 3503/3637 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...