/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:18:02,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:18:02,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:18:02,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:18:02,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:18:02,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:18:02,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:18:02,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:18:02,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:18:02,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:18:02,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:18:02,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:18:02,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:18:02,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:18:02,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:18:02,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:18:02,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:18:02,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:18:02,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:18:02,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:18:02,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:18:02,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:18:02,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:18:02,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:18:02,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:18:02,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:18:02,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:18:02,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:18:02,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:18:02,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:18:02,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:18:02,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:18:02,907 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:18:02,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:18:02,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:18:02,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:18:02,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:18:02,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:18:02,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:18:02,909 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:18:02,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:18:02,909 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:18:02,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:18:02,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:18:02,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:18:02,909 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:18:02,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:18:02,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:18:02,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:18:02,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:18:02,911 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:18:02,911 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:18:03,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:18:03,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:18:03,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:18:03,196 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:18:03,196 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:18:03,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2021-05-06 08:18:03,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/522e3b84e/1b603d2077074b4ea0129d47d41f5f0c/FLAG4e62dd21e [2021-05-06 08:18:03,553 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:18:03,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2021-05-06 08:18:03,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/522e3b84e/1b603d2077074b4ea0129d47d41f5f0c/FLAG4e62dd21e [2021-05-06 08:18:03,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/522e3b84e/1b603d2077074b4ea0129d47d41f5f0c [2021-05-06 08:18:03,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:18:03,988 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:18:03,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:18:03,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:18:03,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:18:03,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:18:03" (1/1) ... [2021-05-06 08:18:03,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1050b0c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:18:03, skipping insertion in model container [2021-05-06 08:18:03,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:18:03" (1/1) ... [2021-05-06 08:18:04,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:18:04,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:18:04,104 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2021-05-06 08:18:04,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:18:04,120 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:18:04,157 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2021-05-06 08:18:04,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:18:04,175 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:18:04,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:18:04 WrapperNode [2021-05-06 08:18:04,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:18:04,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:18:04,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:18:04,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:18:04,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:18:04" (1/1) ... [2021-05-06 08:18:04,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:18:04" (1/1) ... [2021-05-06 08:18:04,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:18:04" (1/1) ... [2021-05-06 08:18:04,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:18:04" (1/1) ... [2021-05-06 08:18:04,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:18:04" (1/1) ... [2021-05-06 08:18:04,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:18:04" (1/1) ... [2021-05-06 08:18:04,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:18:04" (1/1) ... [2021-05-06 08:18:04,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:18:04,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:18:04,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:18:04,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:18:04,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:18:04" (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 08:18:04,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:18:04,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:18:04,259 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:18:04,259 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:18:04,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:18:04,259 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:18:04,259 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:18:04,259 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:18:04,259 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:18:04,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:18:04,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:18:04,260 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:18:04,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:18:04,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:18:04,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:18:04,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:18:04,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:18:04,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:18:04,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:18:04,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:18:04,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:18:04,542 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:18:04,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:18:04 BoogieIcfgContainer [2021-05-06 08:18:04,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:18:04,543 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:18:04,543 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:18:04,544 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:18:04,546 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:18:04" (1/1) ... [2021-05-06 08:18:04,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:18:04 BasicIcfg [2021-05-06 08:18:04,556 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:18:04,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:18:04,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:18:04,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:18:04,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:18:03" (1/4) ... [2021-05-06 08:18:04,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623ec46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:18:04, skipping insertion in model container [2021-05-06 08:18:04,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:18:04" (2/4) ... [2021-05-06 08:18:04,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623ec46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:18:04, skipping insertion in model container [2021-05-06 08:18:04,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:18:04" (3/4) ... [2021-05-06 08:18:04,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623ec46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:18:04, skipping insertion in model container [2021-05-06 08:18:04,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:18:04" (4/4) ... [2021-05-06 08:18:04,561 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.cJordan [2021-05-06 08:18:04,565 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:18:04,567 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:18:04,577 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:18:04,588 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:18:04,588 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:18:04,588 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:18:04,589 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:18:04,589 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:18:04,589 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:18:04,589 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:18:04,589 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:18:04,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 08:18:04,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:18:04,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:04,602 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:04,602 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:04,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:04,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2021-05-06 08:18:04,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:04,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088335406] [2021-05-06 08:18:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:04,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:18:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:04,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:18:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:04,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:18:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:04,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:18:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:04,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:18:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:04,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-06 08:18:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:04,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-06 08:18:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:18:04,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:04,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088335406] [2021-05-06 08:18:04,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088335406] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:18:04,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:18:04,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:18:04,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284486390] [2021-05-06 08:18:04,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:18:04,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:04,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:18:04,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:18:04,881 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:18:05,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:05,070 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-06 08:18:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:18:05,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-06 08:18:05,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:05,077 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:18:05,077 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:18:05,078 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:18:05,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:18:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:18:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:18:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-06 08:18:05,110 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-06 08:18:05,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:05,111 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-06 08:18:05,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:18:05,111 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-06 08:18:05,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:18:05,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:05,113 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:05,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:18:05,113 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:05,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:05,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2021-05-06 08:18:05,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:05,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569516235] [2021-05-06 08:18:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:05,148 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:05,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105576715] [2021-05-06 08:18:05,148 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 08:18:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:05,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:18:05,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:05,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:05,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:05,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:05,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:05,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:18:05,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:05,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569516235] [2021-05-06 08:18:05,459 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:05,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105576715] [2021-05-06 08:18:05,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105576715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:05,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:05,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:18:05,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267801464] [2021-05-06 08:18:05,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:18:05,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:05,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:18:05,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:18:05,461 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:18:05,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:05,586 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-06 08:18:05,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:18:05,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-06 08:18:05,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:05,589 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:18:05,590 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:18:05,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:18:05,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:18:05,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 08:18:05,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:18:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 08:18:05,608 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-06 08:18:05,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:05,608 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 08:18:05,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:18:05,608 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 08:18:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 08:18:05,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:05,611 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:05,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:18:05,817 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:05,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:05,817 INFO L82 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2021-05-06 08:18:05,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:05,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293784552] [2021-05-06 08:18:05,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:05,829 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:05,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296474130] [2021-05-06 08:18:05,829 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 08:18:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:05,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:18:05,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:06,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:18:06,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:06,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293784552] [2021-05-06 08:18:06,143 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:06,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296474130] [2021-05-06 08:18:06,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296474130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:06,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:06,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:18:06,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159299029] [2021-05-06 08:18:06,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:18:06,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:06,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:18:06,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:18:06,146 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:18:06,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:06,349 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-05-06 08:18:06,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:18:06,350 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2021-05-06 08:18:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:06,352 INFO L225 Difference]: With dead ends: 55 [2021-05-06 08:18:06,352 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 08:18:06,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:18:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 08:18:06,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-06 08:18:06,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:18:06,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-06 08:18:06,364 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-06 08:18:06,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:06,364 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-06 08:18:06,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:18:06,365 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-06 08:18:06,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:18:06,366 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:06,366 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:06,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:06,569 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:06,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:06,570 INFO L82 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2021-05-06 08:18:06,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:06,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533379133] [2021-05-06 08:18:06,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:06,579 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:06,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549016909] [2021-05-06 08:18:06,579 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 08:18:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:06,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:18:06,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:06,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:18:06,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:06,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533379133] [2021-05-06 08:18:06,779 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:06,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549016909] [2021-05-06 08:18:06,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549016909] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:06,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:06,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:18:06,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317866810] [2021-05-06 08:18:06,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:18:06,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:06,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:18:06,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:18:06,782 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:18:06,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:06,874 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-06 08:18:06,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:18:06,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-05-06 08:18:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:06,876 INFO L225 Difference]: With dead ends: 54 [2021-05-06 08:18:06,876 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 08:18:06,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:18:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 08:18:06,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 08:18:06,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:18:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-06 08:18:06,880 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-06 08:18:06,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:06,881 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-06 08:18:06,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:18:06,881 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-06 08:18:06,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:18:06,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:06,882 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:07,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:07,088 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:07,089 INFO L82 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2021-05-06 08:18:07,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:07,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210084366] [2021-05-06 08:18:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:07,100 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:07,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961753130] [2021-05-06 08:18:07,101 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 08:18:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:07,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:18:07,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:07,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:18:07,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:07,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210084366] [2021-05-06 08:18:07,352 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:07,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961753130] [2021-05-06 08:18:07,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961753130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:07,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:07,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:18:07,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670831245] [2021-05-06 08:18:07,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:18:07,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:07,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:18:07,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:18:07,353 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:18:07,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:07,459 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-05-06 08:18:07,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:18:07,460 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 08:18:07,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:07,462 INFO L225 Difference]: With dead ends: 58 [2021-05-06 08:18:07,462 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 08:18:07,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:18:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 08:18:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 08:18:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:18:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-06 08:18:07,467 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-06 08:18:07,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:07,467 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-06 08:18:07,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:18:07,467 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-06 08:18:07,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 08:18:07,468 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:07,468 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:07,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:07,673 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:07,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2021-05-06 08:18:07,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:07,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020115976] [2021-05-06 08:18:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:07,681 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:07,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287611787] [2021-05-06 08:18:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:07,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:18:07,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:07,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 08:18:07,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:07,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020115976] [2021-05-06 08:18:07,870 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:07,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287611787] [2021-05-06 08:18:07,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287611787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:07,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:07,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:18:07,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122348022] [2021-05-06 08:18:07,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:18:07,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:07,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:18:07,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:18:07,871 INFO L87 Difference]: Start difference. First operand 57 states and 71 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 08:18:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:07,987 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-06 08:18:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:18:07,987 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2021-05-06 08:18:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:07,988 INFO L225 Difference]: With dead ends: 62 [2021-05-06 08:18:07,988 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 08:18:07,989 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:18:07,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 08:18:07,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-06 08:18:07,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:18:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-06 08:18:07,992 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-06 08:18:07,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:07,993 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-06 08:18:07,993 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 08:18:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-06 08:18:07,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 08:18:07,994 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:07,994 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:08,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:18:08,209 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:08,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:08,209 INFO L82 PathProgramCache]: Analyzing trace with hash 14033329, now seen corresponding path program 1 times [2021-05-06 08:18:08,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:08,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547452666] [2021-05-06 08:18:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:08,217 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:08,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364463867] [2021-05-06 08:18:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:18:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:08,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:18:08,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:08,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:18:08,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:08,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547452666] [2021-05-06 08:18:08,474 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:08,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364463867] [2021-05-06 08:18:08,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364463867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:08,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:08,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:18:08,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742542484] [2021-05-06 08:18:08,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:18:08,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:08,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:18:08,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:18:08,477 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:18:08,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:08,659 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2021-05-06 08:18:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:18:08,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 67 [2021-05-06 08:18:08,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:08,662 INFO L225 Difference]: With dead ends: 78 [2021-05-06 08:18:08,662 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 08:18:08,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:18:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 08:18:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-05-06 08:18:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:18:08,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-05-06 08:18:08,674 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 67 [2021-05-06 08:18:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:08,675 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-05-06 08:18:08,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:18:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-05-06 08:18:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:18:08,678 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:08,678 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:08,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:08,889 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:08,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2021-05-06 08:18:08,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:08,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771278169] [2021-05-06 08:18:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:08,898 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:08,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073593032] [2021-05-06 08:18:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:08,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:18:08,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:08,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:08,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:18:09,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:09,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771278169] [2021-05-06 08:18:09,081 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:09,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073593032] [2021-05-06 08:18:09,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073593032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:09,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:09,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:18:09,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314608558] [2021-05-06 08:18:09,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:18:09,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:09,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:18:09,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:18:09,082 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:18:09,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:09,207 INFO L93 Difference]: Finished difference Result 104 states and 143 transitions. [2021-05-06 08:18:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:18:09,207 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-06 08:18:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:09,208 INFO L225 Difference]: With dead ends: 104 [2021-05-06 08:18:09,208 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 08:18:09,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:18:09,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 08:18:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2021-05-06 08:18:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 35 states have call successors, (35), 9 states have call predecessors, (35), 8 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 08:18:09,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2021-05-06 08:18:09,214 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 69 [2021-05-06 08:18:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:09,215 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2021-05-06 08:18:09,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:18:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2021-05-06 08:18:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 08:18:09,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:09,215 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:09,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:09,439 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:09,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2044653414, now seen corresponding path program 1 times [2021-05-06 08:18:09,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:09,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176522842] [2021-05-06 08:18:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:09,448 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:09,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364497528] [2021-05-06 08:18:09,448 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 08:18:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:09,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:18:09,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:09,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:18:09,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:09,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176522842] [2021-05-06 08:18:09,658 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:09,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364497528] [2021-05-06 08:18:09,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364497528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:09,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:09,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:18:09,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553634602] [2021-05-06 08:18:09,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:18:09,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:09,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:18:09,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:18:09,659 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:18:09,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:09,859 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-05-06 08:18:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:18:09,859 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2021-05-06 08:18:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:09,860 INFO L225 Difference]: With dead ends: 109 [2021-05-06 08:18:09,861 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 08:18:09,861 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:18:09,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 08:18:09,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-05-06 08:18:09,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 56 states have internal predecessors, (63), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 08:18:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 131 transitions. [2021-05-06 08:18:09,866 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 131 transitions. Word has length 70 [2021-05-06 08:18:09,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:09,867 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 131 transitions. [2021-05-06 08:18:09,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:18:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 131 transitions. [2021-05-06 08:18:09,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:18:09,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:09,868 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:10,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:18:10,091 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:10,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:10,092 INFO L82 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 2 times [2021-05-06 08:18:10,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:10,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628390428] [2021-05-06 08:18:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:10,099 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:10,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965416674] [2021-05-06 08:18:10,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:10,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:18:10,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:10,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:18:10,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:10,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:18:10,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:10,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628390428] [2021-05-06 08:18:10,302 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:10,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965416674] [2021-05-06 08:18:10,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965416674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:10,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:10,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:18:10,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811638953] [2021-05-06 08:18:10,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:18:10,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:10,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:18:10,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:18:10,303 INFO L87 Difference]: Start difference. First operand 99 states and 131 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:18:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:10,406 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2021-05-06 08:18:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:18:10,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2021-05-06 08:18:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:10,408 INFO L225 Difference]: With dead ends: 107 [2021-05-06 08:18:10,408 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 08:18:10,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:18:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 08:18:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-06 08:18:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 61 states have internal predecessors, (67), 37 states have call successors, (37), 11 states have call predecessors, (37), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:18:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2021-05-06 08:18:10,422 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 75 [2021-05-06 08:18:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:10,423 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2021-05-06 08:18:10,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:18:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2021-05-06 08:18:10,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:18:10,424 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:10,424 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:10,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:10,631 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:10,632 INFO L82 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 3 times [2021-05-06 08:18:10,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:10,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598512270] [2021-05-06 08:18:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:10,639 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:10,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305659278] [2021-05-06 08:18:10,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:10,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:18:10,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:10,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 08:18:10,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:10,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-06 08:18:10,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:10,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598512270] [2021-05-06 08:18:10,977 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:10,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305659278] [2021-05-06 08:18:10,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305659278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:10,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:10,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:18:10,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701273683] [2021-05-06 08:18:10,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:18:10,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:10,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:18:10,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:18:10,979 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (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 08:18:11,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:11,202 INFO L93 Difference]: Finished difference Result 132 states and 173 transitions. [2021-05-06 08:18:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:18:11,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-06 08:18:11,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:11,204 INFO L225 Difference]: With dead ends: 132 [2021-05-06 08:18:11,204 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 08:18:11,204 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:18:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 08:18:11,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2021-05-06 08:18:11,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 74 states have internal predecessors, (82), 45 states have call successors, (45), 13 states have call predecessors, (45), 12 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 08:18:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2021-05-06 08:18:11,209 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 80 [2021-05-06 08:18:11,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:11,209 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2021-05-06 08:18:11,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (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 08:18:11,209 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2021-05-06 08:18:11,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:18:11,210 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:11,210 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:11,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:11,423 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:11,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:11,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 4 times [2021-05-06 08:18:11,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:11,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822549552] [2021-05-06 08:18:11,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:11,431 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:11,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663454598] [2021-05-06 08:18:11,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:11,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:18:11,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:11,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:18:11,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:11,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-05-06 08:18:11,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:11,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822549552] [2021-05-06 08:18:11,638 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:11,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663454598] [2021-05-06 08:18:11,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663454598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:11,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:11,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:18:11,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057952342] [2021-05-06 08:18:11,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:18:11,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:11,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:18:11,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:18:11,639 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:18:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:11,799 INFO L93 Difference]: Finished difference Result 136 states and 176 transitions. [2021-05-06 08:18:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:18:11,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2021-05-06 08:18:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:11,801 INFO L225 Difference]: With dead ends: 136 [2021-05-06 08:18:11,801 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 08:18:11,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:18:11,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 08:18:11,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 08:18:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 77 states have internal predecessors, (85), 45 states have call successors, (45), 14 states have call predecessors, (45), 13 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 08:18:11,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2021-05-06 08:18:11,805 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 85 [2021-05-06 08:18:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:11,806 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2021-05-06 08:18:11,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:18:11,806 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2021-05-06 08:18:11,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:18:11,806 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:11,807 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:12,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:18:12,015 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:12,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:12,016 INFO L82 PathProgramCache]: Analyzing trace with hash 583225195, now seen corresponding path program 2 times [2021-05-06 08:18:12,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:12,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267130251] [2021-05-06 08:18:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:12,022 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:12,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385210294] [2021-05-06 08:18:12,022 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 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 08:18:12,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:18:12,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:12,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:18:12,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:12,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-06 08:18:12,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:12,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267130251] [2021-05-06 08:18:12,361 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:12,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385210294] [2021-05-06 08:18:12,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385210294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:12,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:12,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:18:12,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317367622] [2021-05-06 08:18:12,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:18:12,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:12,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:18:12,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:18:12,362 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:18:12,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:12,684 INFO L93 Difference]: Finished difference Result 150 states and 198 transitions. [2021-05-06 08:18:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:18:12,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 89 [2021-05-06 08:18:12,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:12,686 INFO L225 Difference]: With dead ends: 150 [2021-05-06 08:18:12,686 INFO L226 Difference]: Without dead ends: 150 [2021-05-06 08:18:12,686 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:18:12,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-06 08:18:12,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2021-05-06 08:18:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 82 states have internal predecessors, (91), 49 states have call successors, (49), 15 states have call predecessors, (49), 14 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:18:12,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2021-05-06 08:18:12,692 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 89 [2021-05-06 08:18:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:12,692 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2021-05-06 08:18:12,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:18:12,692 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2021-05-06 08:18:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:18:12,693 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:12,693 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:12,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:18:12,901 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:12,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:12,901 INFO L82 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2021-05-06 08:18:12,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:12,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218312919] [2021-05-06 08:18:12,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:12,910 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:12,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967803634] [2021-05-06 08:18:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:12,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 08:18:12,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:13,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-06 08:18:13,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:13,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218312919] [2021-05-06 08:18:13,169 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:13,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967803634] [2021-05-06 08:18:13,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967803634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:13,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:13,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:18:13,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357490054] [2021-05-06 08:18:13,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:18:13,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:13,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:18:13,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:18:13,170 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:18:13,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:13,478 INFO L93 Difference]: Finished difference Result 167 states and 218 transitions. [2021-05-06 08:18:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:18:13,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2021-05-06 08:18:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:13,479 INFO L225 Difference]: With dead ends: 167 [2021-05-06 08:18:13,479 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 08:18:13,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:18:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 08:18:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 156. [2021-05-06 08:18:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 90 states have internal predecessors, (100), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-06 08:18:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 204 transitions. [2021-05-06 08:18:13,489 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 204 transitions. Word has length 91 [2021-05-06 08:18:13,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:13,490 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 204 transitions. [2021-05-06 08:18:13,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:18:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 204 transitions. [2021-05-06 08:18:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:18:13,491 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:13,492 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:13,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:18:13,697 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:13,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:13,697 INFO L82 PathProgramCache]: Analyzing trace with hash -761940128, now seen corresponding path program 1 times [2021-05-06 08:18:13,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:13,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596421394] [2021-05-06 08:18:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:13,703 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:13,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779616922] [2021-05-06 08:18:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:18:13,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:18:13,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:13,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-06 08:18:13,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:13,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596421394] [2021-05-06 08:18:13,878 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:13,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779616922] [2021-05-06 08:18:13,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779616922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:13,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:13,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:18:13,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954132752] [2021-05-06 08:18:13,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:18:13,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:13,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:18:13,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:18:13,879 INFO L87 Difference]: Start difference. First operand 156 states and 204 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:18:13,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:13,927 INFO L93 Difference]: Finished difference Result 195 states and 269 transitions. [2021-05-06 08:18:13,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:18:13,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2021-05-06 08:18:13,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:13,929 INFO L225 Difference]: With dead ends: 195 [2021-05-06 08:18:13,929 INFO L226 Difference]: Without dead ends: 195 [2021-05-06 08:18:13,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:18:13,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-06 08:18:13,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2021-05-06 08:18:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 103 states have internal predecessors, (112), 62 states have call successors, (62), 17 states have call predecessors, (62), 16 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 08:18:13,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 234 transitions. [2021-05-06 08:18:13,934 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 234 transitions. Word has length 92 [2021-05-06 08:18:13,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:13,934 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 234 transitions. [2021-05-06 08:18:13,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:18:13,934 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 234 transitions. [2021-05-06 08:18:13,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 08:18:13,935 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:13,935 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:14,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:14,149 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:14,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:14,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1452951817, now seen corresponding path program 5 times [2021-05-06 08:18:14,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:14,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031137152] [2021-05-06 08:18:14,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:14,155 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:14,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338424008] [2021-05-06 08:18:14,155 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 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 08:18:14,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 08:18:14,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:14,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:18:14,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:14,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 08:18:14,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:14,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031137152] [2021-05-06 08:18:14,338 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:14,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338424008] [2021-05-06 08:18:14,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338424008] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:18:14,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:18:14,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:18:14,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071564313] [2021-05-06 08:18:14,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:18:14,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:14,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:18:14,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:18:14,339 INFO L87 Difference]: Start difference. First operand 176 states and 234 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:18:14,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:14,381 INFO L93 Difference]: Finished difference Result 160 states and 203 transitions. [2021-05-06 08:18:14,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:18:14,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2021-05-06 08:18:14,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:14,382 INFO L225 Difference]: With dead ends: 160 [2021-05-06 08:18:14,382 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 08:18:14,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:18:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 08:18:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2021-05-06 08:18:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 89 states have internal predecessors, (92), 49 states have call successors, (49), 17 states have call predecessors, (49), 16 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:18:14,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2021-05-06 08:18:14,386 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 105 [2021-05-06 08:18:14,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:14,386 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2021-05-06 08:18:14,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:18:14,386 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2021-05-06 08:18:14,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 08:18:14,387 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:14,387 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:14,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:18:14,601 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:14,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:14,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 2 times [2021-05-06 08:18:14,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:14,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151601603] [2021-05-06 08:18:14,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:14,607 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:14,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750950029] [2021-05-06 08:18:14,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:14,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:18:14,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:14,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-06 08:18:14,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:14,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 67 proven. 45 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-05-06 08:18:14,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:14,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151601603] [2021-05-06 08:18:14,948 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:14,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750950029] [2021-05-06 08:18:14,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750950029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:14,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:14,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:18:14,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385974171] [2021-05-06 08:18:14,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:18:14,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:14,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:18:14,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:18:14,949 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 08:18:15,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:15,274 INFO L93 Difference]: Finished difference Result 156 states and 193 transitions. [2021-05-06 08:18:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:18:15,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 107 [2021-05-06 08:18:15,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:15,275 INFO L225 Difference]: With dead ends: 156 [2021-05-06 08:18:15,275 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 08:18:15,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:18:15,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 08:18:15,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-05-06 08:18:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 92 states have internal predecessors, (95), 49 states have call successors, (49), 18 states have call predecessors, (49), 17 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:18:15,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 191 transitions. [2021-05-06 08:18:15,280 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 191 transitions. Word has length 107 [2021-05-06 08:18:15,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:15,280 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 191 transitions. [2021-05-06 08:18:15,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 08:18:15,280 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 191 transitions. [2021-05-06 08:18:15,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:18:15,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:15,281 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:15,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:18:15,485 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:15,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:15,485 INFO L82 PathProgramCache]: Analyzing trace with hash 82449829, now seen corresponding path program 3 times [2021-05-06 08:18:15,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:15,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463611807] [2021-05-06 08:18:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:15,491 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:15,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034464184] [2021-05-06 08:18:15,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:15,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:18:15,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:15,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:18:15,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:15,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:15,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:15,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 61 proven. 10 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-06 08:18:15,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:15,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463611807] [2021-05-06 08:18:15,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:15,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034464184] [2021-05-06 08:18:15,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034464184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:15,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:15,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:18:15,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495213271] [2021-05-06 08:18:15,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:18:15,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:15,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:18:15,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:18:15,708 INFO L87 Difference]: Start difference. First operand 154 states and 191 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:18:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:15,756 INFO L93 Difference]: Finished difference Result 158 states and 194 transitions. [2021-05-06 08:18:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:18:15,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-05-06 08:18:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:15,757 INFO L225 Difference]: With dead ends: 158 [2021-05-06 08:18:15,757 INFO L226 Difference]: Without dead ends: 158 [2021-05-06 08:18:15,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:18:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-06 08:18:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-05-06 08:18:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 95 states have internal predecessors, (98), 49 states have call successors, (49), 19 states have call predecessors, (49), 18 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:18:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 194 transitions. [2021-05-06 08:18:15,762 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 194 transitions. Word has length 111 [2021-05-06 08:18:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:15,762 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 194 transitions. [2021-05-06 08:18:15,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:18:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 194 transitions. [2021-05-06 08:18:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 08:18:15,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:15,763 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:15,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:18:15,977 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:15,977 INFO L82 PathProgramCache]: Analyzing trace with hash -966740615, now seen corresponding path program 2 times [2021-05-06 08:18:15,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:15,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751622671] [2021-05-06 08:18:15,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:15,991 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:15,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512446467] [2021-05-06 08:18:15,991 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:16,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:18:16,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:16,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-06 08:18:16,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:16,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:16,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:16,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:16,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:16,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:16,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:16,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:16,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:16,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 73 proven. 31 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-06 08:18:16,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:16,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751622671] [2021-05-06 08:18:16,336 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:16,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512446467] [2021-05-06 08:18:16,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512446467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:16,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:16,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:18:16,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837478475] [2021-05-06 08:18:16,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:18:16,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:16,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:18:16,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:18:16,337 INFO L87 Difference]: Start difference. First operand 158 states and 194 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:18:16,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:16,846 INFO L93 Difference]: Finished difference Result 190 states and 239 transitions. [2021-05-06 08:18:16,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:18:16,847 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) Word has length 113 [2021-05-06 08:18:16,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:16,848 INFO L225 Difference]: With dead ends: 190 [2021-05-06 08:18:16,848 INFO L226 Difference]: Without dead ends: 189 [2021-05-06 08:18:16,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:18:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-06 08:18:16,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2021-05-06 08:18:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 105 states have (on average 1.0952380952380953) internal successors, (115), 110 states have internal predecessors, (115), 61 states have call successors, (61), 21 states have call predecessors, (61), 20 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:18:16,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 235 transitions. [2021-05-06 08:18:16,853 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 235 transitions. Word has length 113 [2021-05-06 08:18:16,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:16,853 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 235 transitions. [2021-05-06 08:18:16,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:18:16,853 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 235 transitions. [2021-05-06 08:18:16,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 08:18:16,854 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:16,854 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:17,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:17,071 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:17,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:17,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1855467922, now seen corresponding path program 3 times [2021-05-06 08:18:17,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:17,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778817774] [2021-05-06 08:18:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:17,078 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:17,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93515316] [2021-05-06 08:18:17,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:17,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:18:17,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:17,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:18:17,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:17,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-06 08:18:17,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:17,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778817774] [2021-05-06 08:18:17,310 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:17,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93515316] [2021-05-06 08:18:17,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93515316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:17,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:17,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:18:17,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264466514] [2021-05-06 08:18:17,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:18:17,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:17,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:18:17,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:18:17,312 INFO L87 Difference]: Start difference. First operand 187 states and 235 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-06 08:18:17,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:17,503 INFO L93 Difference]: Finished difference Result 226 states and 304 transitions. [2021-05-06 08:18:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:18:17,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2021-05-06 08:18:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:17,504 INFO L225 Difference]: With dead ends: 226 [2021-05-06 08:18:17,504 INFO L226 Difference]: Without dead ends: 226 [2021-05-06 08:18:17,504 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:18:17,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-06 08:18:17,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 206. [2021-05-06 08:18:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 112 states have (on average 1.125) internal successors, (126), 113 states have internal predecessors, (126), 73 states have call successors, (73), 21 states have call predecessors, (73), 20 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 08:18:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 270 transitions. [2021-05-06 08:18:17,509 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 270 transitions. Word has length 116 [2021-05-06 08:18:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:17,510 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 270 transitions. [2021-05-06 08:18:17,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-06 08:18:17,510 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 270 transitions. [2021-05-06 08:18:17,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 08:18:17,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:17,511 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:17,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:17,711 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:17,712 INFO L82 PathProgramCache]: Analyzing trace with hash 259955901, now seen corresponding path program 3 times [2021-05-06 08:18:17,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:17,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898282407] [2021-05-06 08:18:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:17,717 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:17,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093367867] [2021-05-06 08:18:17,717 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:17,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:18:17,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:17,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 08:18:17,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:17,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:17,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:18,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:18,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:18,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:18,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:18,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:18,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:18,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:18,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:18,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2021-05-06 08:18:18,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:18,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898282407] [2021-05-06 08:18:18,089 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:18,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093367867] [2021-05-06 08:18:18,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093367867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:18,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:18,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:18:18,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113867176] [2021-05-06 08:18:18,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:18:18,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:18,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:18:18,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:18:18,091 INFO L87 Difference]: Start difference. First operand 206 states and 270 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:18:18,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:18,529 INFO L93 Difference]: Finished difference Result 243 states and 318 transitions. [2021-05-06 08:18:18,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:18:18,529 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2021-05-06 08:18:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:18,530 INFO L225 Difference]: With dead ends: 243 [2021-05-06 08:18:18,530 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 08:18:18,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:18:18,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 08:18:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2021-05-06 08:18:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 130 states have (on average 1.123076923076923) internal successors, (146), 131 states have internal predecessors, (146), 85 states have call successors, (85), 24 states have call predecessors, (85), 23 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:18:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 314 transitions. [2021-05-06 08:18:18,536 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 314 transitions. Word has length 127 [2021-05-06 08:18:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:18,538 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 314 transitions. [2021-05-06 08:18:18,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:18:18,538 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 314 transitions. [2021-05-06 08:18:18,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-06 08:18:18,539 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:18,539 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:18,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:18:18,753 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:18,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:18,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1431100670, now seen corresponding path program 4 times [2021-05-06 08:18:18,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:18,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055484505] [2021-05-06 08:18:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:18,758 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:18,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282811829] [2021-05-06 08:18:18,759 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:18,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:18:18,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:18,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 08:18:18,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:19,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:19,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:19,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 89 proven. 108 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-05-06 08:18:19,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:19,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055484505] [2021-05-06 08:18:19,158 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:19,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282811829] [2021-05-06 08:18:19,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282811829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:19,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:19,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:18:19,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883533292] [2021-05-06 08:18:19,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:18:19,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:19,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:18:19,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:18:19,159 INFO L87 Difference]: Start difference. First operand 239 states and 314 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:18:19,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:19,548 INFO L93 Difference]: Finished difference Result 246 states and 320 transitions. [2021-05-06 08:18:19,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:18:19,550 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 129 [2021-05-06 08:18:19,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:19,551 INFO L225 Difference]: With dead ends: 246 [2021-05-06 08:18:19,551 INFO L226 Difference]: Without dead ends: 246 [2021-05-06 08:18:19,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:18:19,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-06 08:18:19,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2021-05-06 08:18:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 133 states have (on average 1.1203007518796992) internal successors, (149), 134 states have internal predecessors, (149), 85 states have call successors, (85), 25 states have call predecessors, (85), 24 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:18:19,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 317 transitions. [2021-05-06 08:18:19,569 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 317 transitions. Word has length 129 [2021-05-06 08:18:19,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:19,569 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 317 transitions. [2021-05-06 08:18:19,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:18:19,570 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 317 transitions. [2021-05-06 08:18:19,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 08:18:19,570 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:19,570 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:19,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:18:19,771 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:19,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1491357193, now seen corresponding path program 5 times [2021-05-06 08:18:19,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:19,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719695360] [2021-05-06 08:18:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:19,778 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:19,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224785082] [2021-05-06 08:18:19,778 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:19,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:18:19,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:19,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-06 08:18:19,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:20,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:20,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:20,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:20,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:20,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:20,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:20,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:20,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:20,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:20,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:20,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:20,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:20,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:20,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:20,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 92 proven. 110 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-05-06 08:18:20,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:20,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719695360] [2021-05-06 08:18:20,252 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:20,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224785082] [2021-05-06 08:18:20,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224785082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:20,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:20,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:18:20,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139783533] [2021-05-06 08:18:20,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:18:20,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:20,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:18:20,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:18:20,254 INFO L87 Difference]: Start difference. First operand 243 states and 317 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:18:20,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:20,860 INFO L93 Difference]: Finished difference Result 251 states and 324 transitions. [2021-05-06 08:18:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:18:20,860 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 132 [2021-05-06 08:18:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:20,861 INFO L225 Difference]: With dead ends: 251 [2021-05-06 08:18:20,861 INFO L226 Difference]: Without dead ends: 251 [2021-05-06 08:18:20,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:18:20,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-06 08:18:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 247. [2021-05-06 08:18:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 136 states have (on average 1.1176470588235294) internal successors, (152), 137 states have internal predecessors, (152), 85 states have call successors, (85), 26 states have call predecessors, (85), 25 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:18:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 320 transitions. [2021-05-06 08:18:20,868 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 320 transitions. Word has length 132 [2021-05-06 08:18:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:20,869 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 320 transitions. [2021-05-06 08:18:20,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:18:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 320 transitions. [2021-05-06 08:18:20,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-06 08:18:20,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:20,870 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:18:21,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:21,087 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:21,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:21,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1694952883, now seen corresponding path program 4 times [2021-05-06 08:18:21,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:21,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959422969] [2021-05-06 08:18:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:21,097 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:21,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232626178] [2021-05-06 08:18:21,098 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:21,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:18:21,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:21,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 08:18:21,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:21,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:21,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:21,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:21,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:21,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:21,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:21,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:21,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:21,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:21,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:21,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:21,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:21,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:21,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:21,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:21,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:44,037 WARN L205 SmtUtils]: Spent 22.46 s on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-05-06 08:18:44,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:44,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:44,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:44,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:44,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:44,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:44,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:44,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:44,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 121 proven. 93 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-05-06 08:18:44,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:44,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959422969] [2021-05-06 08:18:44,389 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:44,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232626178] [2021-05-06 08:18:44,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232626178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:44,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:44,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:18:44,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103068670] [2021-05-06 08:18:44,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:18:44,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:44,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:18:44,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:18:44,390 INFO L87 Difference]: Start difference. First operand 247 states and 320 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) [2021-05-06 08:18:45,268 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-05-06 08:19:42,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:19:42,613 INFO L93 Difference]: Finished difference Result 290 states and 380 transitions. [2021-05-06 08:19:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:19:42,614 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) Word has length 135 [2021-05-06 08:19:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:19:42,615 INFO L225 Difference]: With dead ends: 290 [2021-05-06 08:19:42,615 INFO L226 Difference]: Without dead ends: 289 [2021-05-06 08:19:42,616 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 23214.3ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:19:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-05-06 08:19:42,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 286. [2021-05-06 08:19:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 156 states have (on average 1.1217948717948718) internal successors, (175), 157 states have internal predecessors, (175), 101 states have call successors, (101), 29 states have call predecessors, (101), 28 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-06 08:19:42,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 375 transitions. [2021-05-06 08:19:42,622 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 375 transitions. Word has length 135 [2021-05-06 08:19:42,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:19:42,623 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 375 transitions. [2021-05-06 08:19:42,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) [2021-05-06 08:19:42,623 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 375 transitions. [2021-05-06 08:19:42,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 08:19:42,624 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:19:42,624 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:19:42,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 08:19:42,838 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:19:42,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:19:42,839 INFO L82 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 5 times [2021-05-06 08:19:42,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:19:42,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069076526] [2021-05-06 08:19:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:19:42,846 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:19:42,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791174063] [2021-05-06 08:19:42,846 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:19:42,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:19:42,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:19:42,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 08:19:42,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:19:42,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:42,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:42,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:42,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:42,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:42,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 38 proven. 52 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2021-05-06 08:19:43,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:19:43,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069076526] [2021-05-06 08:19:43,355 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:19:43,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791174063] [2021-05-06 08:19:43,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791174063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:19:43,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:19:43,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:19:43,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845453012] [2021-05-06 08:19:43,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:19:43,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:19:43,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:19:43,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:19:43,357 INFO L87 Difference]: Start difference. First operand 286 states and 375 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2021-05-06 08:19:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:19:44,217 INFO L93 Difference]: Finished difference Result 334 states and 439 transitions. [2021-05-06 08:19:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:19:44,218 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 138 [2021-05-06 08:19:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:19:44,219 INFO L225 Difference]: With dead ends: 334 [2021-05-06 08:19:44,219 INFO L226 Difference]: Without dead ends: 333 [2021-05-06 08:19:44,220 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:19:44,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-06 08:19:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 267. [2021-05-06 08:19:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 146 states have (on average 1.1232876712328768) internal successors, (164), 147 states have internal predecessors, (164), 93 states have call successors, (93), 28 states have call predecessors, (93), 27 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2021-05-06 08:19:44,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 348 transitions. [2021-05-06 08:19:44,226 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 348 transitions. Word has length 138 [2021-05-06 08:19:44,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:19:44,226 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 348 transitions. [2021-05-06 08:19:44,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2021-05-06 08:19:44,227 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 348 transitions. [2021-05-06 08:19:44,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 08:19:44,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:19:44,228 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:19:44,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:19:44,445 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:19:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:19:44,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1855514487, now seen corresponding path program 6 times [2021-05-06 08:19:44,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:19:44,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600693275] [2021-05-06 08:19:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:19:44,451 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:19:44,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176125081] [2021-05-06 08:19:44,451 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:19:44,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:19:44,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:19:44,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-06 08:19:44,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:19:44,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:44,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:44,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 86 proven. 54 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2021-05-06 08:19:44,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:19:44,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600693275] [2021-05-06 08:19:44,773 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:19:44,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176125081] [2021-05-06 08:19:44,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176125081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:19:44,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:19:44,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:19:44,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625770073] [2021-05-06 08:19:44,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:19:44,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:19:44,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:19:44,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:19:44,777 INFO L87 Difference]: Start difference. First operand 267 states and 348 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2021-05-06 08:19:45,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:19:45,362 INFO L93 Difference]: Finished difference Result 375 states and 508 transitions. [2021-05-06 08:19:45,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:19:45,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) Word has length 149 [2021-05-06 08:19:45,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:19:45,364 INFO L225 Difference]: With dead ends: 375 [2021-05-06 08:19:45,364 INFO L226 Difference]: Without dead ends: 375 [2021-05-06 08:19:45,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:19:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-06 08:19:45,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 359. [2021-05-06 08:19:45,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 193 states have (on average 1.1295336787564767) internal successors, (218), 194 states have internal predecessors, (218), 133 states have call successors, (133), 33 states have call predecessors, (133), 32 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2021-05-06 08:19:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 482 transitions. [2021-05-06 08:19:45,372 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 482 transitions. Word has length 149 [2021-05-06 08:19:45,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:19:45,372 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 482 transitions. [2021-05-06 08:19:45,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2021-05-06 08:19:45,373 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 482 transitions. [2021-05-06 08:19:45,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 08:19:45,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:19:45,374 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:19:45,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:19:45,589 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:19:45,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:19:45,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1402624196, now seen corresponding path program 7 times [2021-05-06 08:19:45,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:19:45,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143669921] [2021-05-06 08:19:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:19:45,597 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:19:45,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007007740] [2021-05-06 08:19:45,597 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:19:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:19:45,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 08:19:45,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:19:46,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 91 proven. 59 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2021-05-06 08:19:46,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:19:46,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143669921] [2021-05-06 08:19:46,048 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:19:46,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007007740] [2021-05-06 08:19:46,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007007740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:19:46,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:19:46,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:19:46,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478946905] [2021-05-06 08:19:46,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:19:46,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:19:46,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:19:46,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:19:46,049 INFO L87 Difference]: Start difference. First operand 359 states and 482 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2021-05-06 08:19:46,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:19:46,668 INFO L93 Difference]: Finished difference Result 373 states and 493 transitions. [2021-05-06 08:19:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:19:46,669 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 151 [2021-05-06 08:19:46,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:19:46,670 INFO L225 Difference]: With dead ends: 373 [2021-05-06 08:19:46,670 INFO L226 Difference]: Without dead ends: 373 [2021-05-06 08:19:46,670 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:19:46,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-06 08:19:46,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 338. [2021-05-06 08:19:46,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 184 states have (on average 1.125) internal successors, (207), 185 states have internal predecessors, (207), 121 states have call successors, (121), 33 states have call predecessors, (121), 32 states have return successors, (119), 119 states have call predecessors, (119), 119 states have call successors, (119) [2021-05-06 08:19:46,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 447 transitions. [2021-05-06 08:19:46,682 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 447 transitions. Word has length 151 [2021-05-06 08:19:46,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:19:46,683 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 447 transitions. [2021-05-06 08:19:46,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2021-05-06 08:19:46,683 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 447 transitions. [2021-05-06 08:19:46,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 08:19:46,684 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:19:46,684 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:19:46,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:19:46,902 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:19:46,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:19:46,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1866948721, now seen corresponding path program 8 times [2021-05-06 08:19:46,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:19:46,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038730046] [2021-05-06 08:19:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:19:46,909 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:19:46,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317822395] [2021-05-06 08:19:46,909 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:19:47,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:19:47,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:19:47,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-06 08:19:47,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:19:47,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:47,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,286 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 21 [2021-05-06 08:19:48,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 123 proven. 203 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-05-06 08:19:48,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:19:48,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038730046] [2021-05-06 08:19:48,473 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:19:48,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317822395] [2021-05-06 08:19:48,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317822395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:19:48,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:19:48,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:19:48,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062411750] [2021-05-06 08:19:48,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:19:48,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:19:48,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:19:48,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:19:48,474 INFO L87 Difference]: Start difference. First operand 338 states and 447 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-06 08:19:49,238 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-06 08:19:50,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:19:50,470 INFO L93 Difference]: Finished difference Result 345 states and 453 transitions. [2021-05-06 08:19:50,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:19:50,471 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) Word has length 154 [2021-05-06 08:19:50,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:19:50,473 INFO L225 Difference]: With dead ends: 345 [2021-05-06 08:19:50,473 INFO L226 Difference]: Without dead ends: 345 [2021-05-06 08:19:50,473 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1517.0ms TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:19:50,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-06 08:19:50,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2021-05-06 08:19:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 187 states have (on average 1.1229946524064172) internal successors, (210), 188 states have internal predecessors, (210), 121 states have call successors, (121), 34 states have call predecessors, (121), 33 states have return successors, (119), 119 states have call predecessors, (119), 119 states have call successors, (119) [2021-05-06 08:19:50,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 450 transitions. [2021-05-06 08:19:50,482 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 450 transitions. Word has length 154 [2021-05-06 08:19:50,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:19:50,483 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 450 transitions. [2021-05-06 08:19:50,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-06 08:19:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 450 transitions. [2021-05-06 08:19:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 08:19:50,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:19:50,484 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:19:50,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:19:50,702 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:19:50,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:19:50,702 INFO L82 PathProgramCache]: Analyzing trace with hash 742722429, now seen corresponding path program 9 times [2021-05-06 08:19:50,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:19:50,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514821428] [2021-05-06 08:19:50,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:19:50,708 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:19:50,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248882851] [2021-05-06 08:19:50,708 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:19:51,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:19:51,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:19:51,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-06 08:19:51,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:19:51,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:51,902 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-05-06 08:19:52,311 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-06 08:19:52,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:52,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:52,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:52,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:52,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:52,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:52,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:52,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:52,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 132 proven. 80 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2021-05-06 08:19:52,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:19:52,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514821428] [2021-05-06 08:19:52,493 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:19:52,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248882851] [2021-05-06 08:19:52,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248882851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:19:52,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:19:52,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:19:52,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472953833] [2021-05-06 08:19:52,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:19:52,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:19:52,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:19:52,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:19:52,494 INFO L87 Difference]: Start difference. First operand 342 states and 450 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:19:54,541 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-05-06 08:19:55,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:19:55,761 INFO L93 Difference]: Finished difference Result 382 states and 494 transitions. [2021-05-06 08:19:55,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:19:55,762 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 154 [2021-05-06 08:19:55,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:19:55,763 INFO L225 Difference]: With dead ends: 382 [2021-05-06 08:19:55,763 INFO L226 Difference]: Without dead ends: 382 [2021-05-06 08:19:55,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2168.8ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:19:55,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-05-06 08:19:55,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 378. [2021-05-06 08:19:55,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 209 states have (on average 1.1196172248803828) internal successors, (234), 210 states have internal predecessors, (234), 129 states have call successors, (129), 40 states have call predecessors, (129), 39 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2021-05-06 08:19:55,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 490 transitions. [2021-05-06 08:19:55,772 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 490 transitions. Word has length 154 [2021-05-06 08:19:55,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:19:55,772 INFO L480 AbstractCegarLoop]: Abstraction has 378 states and 490 transitions. [2021-05-06 08:19:55,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:19:55,773 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 490 transitions. [2021-05-06 08:19:55,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 08:19:55,774 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:19:55,774 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:19:55,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:19:55,981 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:19:55,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:19:55,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1947214227, now seen corresponding path program 6 times [2021-05-06 08:19:55,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:19:55,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537003174] [2021-05-06 08:19:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:19:55,986 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:19:55,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029204311] [2021-05-06 08:19:55,986 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:19:56,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:19:56,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:19:56,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:19:56,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:19:56,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 87 proven. 48 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2021-05-06 08:19:56,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:19:56,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537003174] [2021-05-06 08:19:56,430 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:19:56,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029204311] [2021-05-06 08:19:56,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029204311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:19:56,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:19:56,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:19:56,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971005731] [2021-05-06 08:19:56,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:19:56,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:19:56,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:19:56,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:19:56,431 INFO L87 Difference]: Start difference. First operand 378 states and 490 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-06 08:19:56,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:19:56,797 INFO L93 Difference]: Finished difference Result 392 states and 501 transitions. [2021-05-06 08:19:56,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:19:56,798 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 157 [2021-05-06 08:19:56,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:19:56,799 INFO L225 Difference]: With dead ends: 392 [2021-05-06 08:19:56,799 INFO L226 Difference]: Without dead ends: 391 [2021-05-06 08:19:56,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 256.7ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:19:56,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-06 08:19:56,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 390. [2021-05-06 08:19:56,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 218 states have (on average 1.110091743119266) internal successors, (242), 219 states have internal predecessors, (242), 129 states have call successors, (129), 43 states have call predecessors, (129), 42 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2021-05-06 08:19:56,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 498 transitions. [2021-05-06 08:19:56,807 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 498 transitions. Word has length 157 [2021-05-06 08:19:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:19:56,807 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 498 transitions. [2021-05-06 08:19:56,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-06 08:19:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 498 transitions. [2021-05-06 08:19:56,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-06 08:19:56,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:19:56,809 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:19:57,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-06 08:19:57,009 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:19:57,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:19:57,010 INFO L82 PathProgramCache]: Analyzing trace with hash 915217378, now seen corresponding path program 7 times [2021-05-06 08:19:57,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:19:57,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077560742] [2021-05-06 08:19:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:19:57,014 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:19:57,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099680021] [2021-05-06 08:19:57,015 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:19:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:19:57,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 08:19:57,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:19:57,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:57,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:58,032 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-06 08:19:58,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:58,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:58,479 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-06 08:19:58,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:58,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:58,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:58,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:58,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 183 proven. 131 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-05-06 08:19:58,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:19:58,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077560742] [2021-05-06 08:19:58,787 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:19:58,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099680021] [2021-05-06 08:19:58,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099680021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:19:58,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:19:58,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:19:58,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741417158] [2021-05-06 08:19:58,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 08:19:58,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:19:58,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 08:19:58,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:19:58,788 INFO L87 Difference]: Start difference. First operand 390 states and 498 transitions. Second operand has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2021-05-06 08:20:00,058 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-06 08:20:01,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:01,095 INFO L93 Difference]: Finished difference Result 424 states and 552 transitions. [2021-05-06 08:20:01,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:20:01,096 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) Word has length 160 [2021-05-06 08:20:01,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:01,096 INFO L225 Difference]: With dead ends: 424 [2021-05-06 08:20:01,096 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:20:01,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1948.9ms TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-05-06 08:20:01,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:20:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:20:01,097 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 08:20:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:20:01,097 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 160 [2021-05-06 08:20:01,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:01,097 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:20:01,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2021-05-06 08:20:01,097 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:20:01,097 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:20:01,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:01,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:20:01 BasicIcfg [2021-05-06 08:20:01,301 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:20:01,301 INFO L168 Benchmark]: Toolchain (without parser) took 117314.02 ms. Allocated memory was 208.7 MB in the beginning and 368.1 MB in the end (delta: 159.4 MB). Free memory was 173.1 MB in the beginning and 257.9 MB in the end (delta: -84.8 MB). Peak memory consumption was 75.3 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:01,302 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 208.7 MB. Free memory is still 189.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:20:01,302 INFO L168 Benchmark]: CACSL2BoogieTranslator took 185.53 ms. Allocated memory is still 208.7 MB. Free memory was 172.9 MB in the beginning and 191.6 MB in the end (delta: -18.7 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:01,302 INFO L168 Benchmark]: Boogie Preprocessor took 24.70 ms. Allocated memory is still 208.7 MB. Free memory was 191.1 MB in the beginning and 190.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:01,302 INFO L168 Benchmark]: RCFGBuilder took 339.65 ms. Allocated memory is still 208.7 MB. Free memory was 189.5 MB in the beginning and 172.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:01,302 INFO L168 Benchmark]: IcfgTransformer took 13.23 ms. Allocated memory is still 208.7 MB. Free memory was 172.2 MB in the beginning and 171.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:01,302 INFO L168 Benchmark]: TraceAbstraction took 116743.63 ms. Allocated memory was 208.7 MB in the beginning and 368.1 MB in the end (delta: 159.4 MB). Free memory was 170.7 MB in the beginning and 257.9 MB in the end (delta: -87.2 MB). Peak memory consumption was 73.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:01,302 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 208.7 MB. Free memory is still 189.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 185.53 ms. Allocated memory is still 208.7 MB. Free memory was 172.9 MB in the beginning and 191.6 MB in the end (delta: -18.7 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.70 ms. Allocated memory is still 208.7 MB. Free memory was 191.1 MB in the beginning and 190.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 339.65 ms. Allocated memory is still 208.7 MB. Free memory was 189.5 MB in the beginning and 172.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.23 ms. Allocated memory is still 208.7 MB. Free memory was 172.2 MB in the beginning and 171.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 116743.63 ms. Allocated memory was 208.7 MB in the beginning and 368.1 MB in the end (delta: 159.4 MB). Free memory was 170.7 MB in the beginning and 257.9 MB in the end (delta: -87.2 MB). Peak memory consumption was 73.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 116711.1ms, OverallIterations: 31, TraceHistogramMax: 21, EmptinessCheckTime: 35.1ms, AutomataDifference: 73380.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1502 SDtfs, 847 SDslu, 9251 SDs, 0 SdLazy, 10120 SolverSat, 993 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68108.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3243 GetRequests, 2810 SyntacticMatches, 17 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 32007.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=390occurred in iteration=30, InterpolantAutomatonStates: 342, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 233.1ms AutomataMinimizationTime, 31 MinimizatonAttempts, 263 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 304.1ms SsaConstructionTime, 1323.0ms SatisfiabilityAnalysisTime, 33967.2ms InterpolantComputationTime, 3153 NumberOfCodeBlocks, 2734 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 3122 ConstructedInterpolants, 0 QuantifiedInterpolants, 18253 SizeOfPredicates, 212 NumberOfNonLiveVariables, 7802 ConjunctsInSsa, 1103 ConjunctsInUnsatCore, 31 InterpolantComputations, 2 PerfectInterpolantSequences, 10120/11353 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...