/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/ps5-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:31:55,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:31:55,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:31:55,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:31:55,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:31:55,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:31:55,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:31:55,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:31:55,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:31:55,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:31:55,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:31:55,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:31:55,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:31:55,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:31:55,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:31:55,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:31:55,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:31:55,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:31:55,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:31:55,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:31:55,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:31:55,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:31:55,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:31:55,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:31:55,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:31:55,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:31:55,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:31:55,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:31:55,935 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:31:55,947 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:31:55,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:31:55,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:31:55,949 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:31:55,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:31:55,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:31:55,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:31:55,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:31:55,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:31:55,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:31:55,950 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:31:55,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:31:55,950 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:31:55,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:31:55,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:31:55,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:31:55,951 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:31:55,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:31:55,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:31:55,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:31:55,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:31:55,952 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:31:55,952 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:31:56,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:31:56,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:31:56,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:31:56,181 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:31:56,181 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:31:56,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound10.c [2021-05-06 10:31:56,224 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8fcb22d6/92d81be334bc44c6b9065733d318b58b/FLAG6dae409a9 [2021-05-06 10:31:56,584 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:31:56,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound10.c [2021-05-06 10:31:56,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8fcb22d6/92d81be334bc44c6b9065733d318b58b/FLAG6dae409a9 [2021-05-06 10:31:56,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8fcb22d6/92d81be334bc44c6b9065733d318b58b [2021-05-06 10:31:56,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:31:56,605 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:31:56,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:31:56,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:31:56,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:31:56,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:31:56" (1/1) ... [2021-05-06 10:31:56,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7559fe95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:31:56, skipping insertion in model container [2021-05-06 10:31:56,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:31:56" (1/1) ... [2021-05-06 10:31:56,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:31:56,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:31:56,732 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/ps5-ll_valuebound10.c[458,471] [2021-05-06 10:31:56,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:31:56,756 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:31:56,764 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/ps5-ll_valuebound10.c[458,471] [2021-05-06 10:31:56,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:31:56,788 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:31:56,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:31:56 WrapperNode [2021-05-06 10:31:56,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:31:56,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:31:56,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:31:56,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:31:56,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:31:56" (1/1) ... [2021-05-06 10:31:56,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:31:56" (1/1) ... [2021-05-06 10:31:56,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:31:56" (1/1) ... [2021-05-06 10:31:56,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:31:56" (1/1) ... [2021-05-06 10:31:56,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:31:56" (1/1) ... [2021-05-06 10:31:56,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:31:56" (1/1) ... [2021-05-06 10:31:56,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:31:56" (1/1) ... [2021-05-06 10:31:56,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:31:56,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:31:56,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:31:56,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:31:56,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:31:56" (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 10:31:56,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:31:56,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:31:56,916 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:31:56,916 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:31:56,916 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:31:56,917 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:31:56,917 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:31:56,917 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:31:56,917 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:31:56,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:31:56,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:31:56,917 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:31:56,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:31:56,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:31:56,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:31:56,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:31:56,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:31:56,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:31:56,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:31:56,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:31:57,054 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:31:57,054 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:31:57,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:31:57 BoogieIcfgContainer [2021-05-06 10:31:57,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:31:57,056 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:31:57,056 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:31:57,056 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:31:57,058 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:31:57" (1/1) ... [2021-05-06 10:31:57,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:31:57 BasicIcfg [2021-05-06 10:31:57,067 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:31:57,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:31:57,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:31:57,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:31:57,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:31:56" (1/4) ... [2021-05-06 10:31:57,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16803c04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:31:57, skipping insertion in model container [2021-05-06 10:31:57,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:31:56" (2/4) ... [2021-05-06 10:31:57,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16803c04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:31:57, skipping insertion in model container [2021-05-06 10:31:57,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:31:57" (3/4) ... [2021-05-06 10:31:57,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16803c04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:31:57, skipping insertion in model container [2021-05-06 10:31:57,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:31:57" (4/4) ... [2021-05-06 10:31:57,072 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound10.cJordan [2021-05-06 10:31:57,075 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:31:57,077 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:31:57,088 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:31:57,099 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:31:57,099 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:31:57,099 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:31:57,100 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:31:57,100 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:31:57,100 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:31:57,100 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:31:57,100 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:31:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:31:57,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:31:57,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:31:57,126 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:31:57,126 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:31:57,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:31:57,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2021-05-06 10:31:57,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:31:57,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104414860] [2021-05-06 10:31:57,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:31:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:31:57,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:31:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:31:57,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:31:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:31:57,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 10:31:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:31:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:31:57,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:31:57,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104414860] [2021-05-06 10:31:57,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104414860] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:31:57,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:31:57,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:31:57,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978550804] [2021-05-06 10:31:57,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:31:57,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:31:57,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:31:57,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:31:57,374 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:31:57,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:31:57,435 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-06 10:31:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:31:57,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 10:31:57,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:31:57,442 INFO L225 Difference]: With dead ends: 29 [2021-05-06 10:31:57,442 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 10:31:57,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:31:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 10:31:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 10:31:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:31:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:31:57,468 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-06 10:31:57,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:31:57,468 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:31:57,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:31:57,469 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:31:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:31:57,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:31:57,470 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:31:57,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:31:57,471 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:31:57,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:31:57,471 INFO L82 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2021-05-06 10:31:57,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:31:57,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715079142] [2021-05-06 10:31:57,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:31:57,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:31:57,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718401072] [2021-05-06 10:31:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:31:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:31:57,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:31:57,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:31:57,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:31:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:31:57,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:31:57,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715079142] [2021-05-06 10:31:57,679 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:31:57,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718401072] [2021-05-06 10:31:57,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718401072] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:31:57,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:31:57,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:31:57,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927966033] [2021-05-06 10:31:57,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:31:57,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:31:57,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:31:57,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:31:57,683 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:31:57,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:31:57,723 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-06 10:31:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:31:57,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-06 10:31:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:31:57,725 INFO L225 Difference]: With dead ends: 33 [2021-05-06 10:31:57,725 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 10:31:57,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:31:57,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 10:31:57,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 10:31:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:31:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-06 10:31:57,736 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-06 10:31:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:31:57,737 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-06 10:31:57,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:31:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-06 10:31:57,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 10:31:57,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:31:57,743 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:31:57,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:31:57,965 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:31:57,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:31:57,965 INFO L82 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2021-05-06 10:31:57,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:31:57,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008675435] [2021-05-06 10:31:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:31:57,985 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:31:57,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756571591] [2021-05-06 10:31:57,985 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 10:31:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:31:58,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:31:58,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:31:58,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:31:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:31:58,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:31:58,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008675435] [2021-05-06 10:31:58,100 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:31:58,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756571591] [2021-05-06 10:31:58,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756571591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:31:58,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:31:58,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:31:58,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006671163] [2021-05-06 10:31:58,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:31:58,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:31:58,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:31:58,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:31:58,102 INFO L87 Difference]: Start difference. First operand 31 states and 34 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, (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 10:31:58,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:31:58,147 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-06 10:31:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:31:58,147 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, (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 29 [2021-05-06 10:31:58,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:31:58,148 INFO L225 Difference]: With dead ends: 40 [2021-05-06 10:31:58,148 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 10:31:58,148 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:31:58,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 10:31:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 10:31:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:31:58,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-06 10:31:58,152 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-06 10:31:58,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:31:58,152 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-06 10:31:58,152 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, (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 10:31:58,152 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-06 10:31:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 10:31:58,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:31:58,153 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:31:58,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:31:58,353 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:31:58,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:31:58,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1813677706, now seen corresponding path program 2 times [2021-05-06 10:31:58,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:31:58,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490584859] [2021-05-06 10:31:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:31:58,361 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:31:58,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857770527] [2021-05-06 10:31:58,362 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 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 10:31:58,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:31:58,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:31:58,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:31:58,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:31:58,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:31:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 10:31:58,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:31:58,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490584859] [2021-05-06 10:31:58,626 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:31:58,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857770527] [2021-05-06 10:31:58,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857770527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:31:58,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:31:58,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:31:58,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765507604] [2021-05-06 10:31:58,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:31:58,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:31:58,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:31:58,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:31:58,628 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:31:58,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:31:58,724 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-05-06 10:31:58,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:31:58,725 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 10:31:58,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:31:58,726 INFO L225 Difference]: With dead ends: 49 [2021-05-06 10:31:58,726 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:31:58,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:31:58,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:31:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-06 10:31:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:31:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-06 10:31:58,730 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-06 10:31:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:31:58,730 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-06 10:31:58,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:31:58,730 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-06 10:31:58,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 10:31:58,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:31:58,731 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:31:58,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:31:58,937 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:31:58,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:31:58,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2021-05-06 10:31:58,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:31:58,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235470595] [2021-05-06 10:31:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:31:58,946 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:31:58,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901476468] [2021-05-06 10:31:58,946 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 10:31:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:31:59,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:31:59,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:31:59,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:31:59,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:31:59,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:31:59,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:31:59,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:31:59,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:31:59,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:31:59,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:31:59,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:31:59,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:31:59,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:31:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 10:31:59,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:31:59,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235470595] [2021-05-06 10:31:59,145 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:31:59,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901476468] [2021-05-06 10:31:59,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901476468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:31:59,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:31:59,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:31:59,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102615478] [2021-05-06 10:31:59,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:31:59,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:31:59,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:31:59,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:31:59,147 INFO L87 Difference]: Start difference. First operand 47 states and 54 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:31:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:31:59,190 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-05-06 10:31:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:31:59,190 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-06 10:31:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:31:59,192 INFO L225 Difference]: With dead ends: 52 [2021-05-06 10:31:59,192 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:31:59,192 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:31:59,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:31:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:31:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:31:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 10:31:59,195 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-06 10:31:59,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:31:59,196 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 10:31:59,196 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:31:59,196 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 10:31:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 10:31:59,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:31:59,196 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:31:59,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:31:59,405 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:31:59,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:31:59,405 INFO L82 PathProgramCache]: Analyzing trace with hash -241657738, now seen corresponding path program 3 times [2021-05-06 10:31:59,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:31:59,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105885815] [2021-05-06 10:31:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:31:59,413 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:31:59,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824793540] [2021-05-06 10:31:59,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:38:01,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:38:01,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:38:01,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:38:01,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:38:01,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:01,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:01,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-06 10:38:01,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:38:01,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105885815] [2021-05-06 10:38:01,339 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:38:01,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824793540] [2021-05-06 10:38:01,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824793540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:38:01,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:38:01,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:38:01,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704939280] [2021-05-06 10:38:01,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:38:01,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:38:01,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:38:01,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:38:01,341 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 10:38:01,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:38:01,400 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-06 10:38:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:38:01,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-06 10:38:01,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:38:01,401 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:38:01,401 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 10:38:01,401 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:38:01,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 10:38:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-06 10:38:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:38:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-06 10:38:01,404 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-06 10:38:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:38:01,404 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-06 10:38:01,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 10:38:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-06 10:38:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 10:38:01,405 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:38:01,405 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:38:01,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 10:38:01,605 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:38:01,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:38:01,606 INFO L82 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2021-05-06 10:38:01,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:38:01,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071180082] [2021-05-06 10:38:01,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:38:01,613 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:38:01,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277639974] [2021-05-06 10:38:01,613 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 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 10:38:01,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:38:01,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:38:01,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 10:38:01,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:38:01,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:01,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:01,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:01,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:01,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:01,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:01,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:01,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:01,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:01,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:01,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 10:38:01,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:38:01,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071180082] [2021-05-06 10:38:01,869 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:38:01,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277639974] [2021-05-06 10:38:01,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277639974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:38:01,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:38:01,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:38:01,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980311372] [2021-05-06 10:38:01,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:38:01,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:38:01,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:38:01,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:38:01,870 INFO L87 Difference]: Start difference. First operand 40 states and 42 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 10:38:01,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:38:01,917 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-06 10:38:01,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:38:01,918 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-06 10:38:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:38:01,918 INFO L225 Difference]: With dead ends: 47 [2021-05-06 10:38:01,918 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 10:38:01,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:38:01,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 10:38:01,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 10:38:01,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:38:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-06 10:38:01,921 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-06 10:38:01,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:38:01,921 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-06 10:38:01,921 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 10:38:01,921 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-06 10:38:01,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 10:38:01,922 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:38:01,922 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:38:02,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:38:02,123 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:38:02,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:38:02,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2021-05-06 10:38:02,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:38:02,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112703787] [2021-05-06 10:38:02,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:38:02,130 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:38:02,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644689416] [2021-05-06 10:38:02,130 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 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 10:38:02,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 10:38:02,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:38:02,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:38:02,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:38:02,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 10:38:02,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:38:02,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112703787] [2021-05-06 10:38:02,605 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:38:02,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644689416] [2021-05-06 10:38:02,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644689416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:38:02,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:38:02,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:38:02,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494208624] [2021-05-06 10:38:02,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:38:02,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:38:02,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:38:02,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:38:02,606 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 10:38:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:38:02,675 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-05-06 10:38:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:38:02,675 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-06 10:38:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:38:02,676 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:38:02,676 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:38:02,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:38:02,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:38:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:38:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:38:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-06 10:38:02,679 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2021-05-06 10:38:02,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:38:02,679 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-06 10:38:02,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 10:38:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-06 10:38:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 10:38:02,680 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:38:02,680 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:38:02,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:38:02,885 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:38:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:38:02,886 INFO L82 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2021-05-06 10:38:02,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:38:02,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147496939] [2021-05-06 10:38:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:38:02,899 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:38:02,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864601125] [2021-05-06 10:38:02,899 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 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 10:38:02,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:38:02,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:38:02,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:38:02,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:38:03,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:03,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:03,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:03,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:03,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:03,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:03,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:03,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:03,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:03,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:03,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 10:38:03,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:38:03,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147496939] [2021-05-06 10:38:03,105 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:38:03,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864601125] [2021-05-06 10:38:03,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864601125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:38:03,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:38:03,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:38:03,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151087644] [2021-05-06 10:38:03,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:38:03,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:38:03,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:38:03,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:38:03,106 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 10:38:03,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:38:03,182 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-06 10:38:03,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:38:03,182 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2021-05-06 10:38:03,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:38:03,184 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:38:03,184 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:38:03,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:38:03,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:38:03,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 10:38:03,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:38:03,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-06 10:38:03,194 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 61 [2021-05-06 10:38:03,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:38:03,194 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-06 10:38:03,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 10:38:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-06 10:38:03,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 10:38:03,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:38:03,196 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:38:03,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 10:38:03,409 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:38:03,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:38:03,409 INFO L82 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2021-05-06 10:38:03,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:38:03,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174673194] [2021-05-06 10:38:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:38:03,415 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:38:03,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964986810] [2021-05-06 10:38:03,415 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