/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/divbin_unwindbound100.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:55:50,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:55:50,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:55:50,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:55:50,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:55:50,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:55:50,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:55:50,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:55:50,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:55:51,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:55:51,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:55:51,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:55:51,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:55:51,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:55:51,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:55:51,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:55:51,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:55:51,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:55:51,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:55:51,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:55:51,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:55:51,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:55:51,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:55:51,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:55:51,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:55:51,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:55:51,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:55:51,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:55:51,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:55:51,066 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:55:51,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:55:51,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:55:51,069 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:55:51,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:55:51,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:55:51,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:55:51,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:55:51,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:55:51,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:55:51,071 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:55:51,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:55:51,071 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:55:51,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:55:51,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:55:51,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:55:51,072 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:55:51,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:55:51,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:55:51,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:55:51,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:55:51,073 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:55:51,074 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:55:51,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:55:51,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:55:51,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:55:51,386 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:55:51,387 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:55:51,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound100.i [2021-05-06 07:55:51,440 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/603a6bb78/99dc75f4d9d74ddbb400705453899376/FLAGd72748562 [2021-05-06 07:55:51,866 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:55:51,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound100.i [2021-05-06 07:55:51,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/603a6bb78/99dc75f4d9d74ddbb400705453899376/FLAGd72748562 [2021-05-06 07:55:51,885 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/603a6bb78/99dc75f4d9d74ddbb400705453899376 [2021-05-06 07:55:51,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:55:51,889 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:55:51,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:55:51,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:55:51,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:55:51,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:55:51" (1/1) ... [2021-05-06 07:55:51,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@531d6bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:55:51, skipping insertion in model container [2021-05-06 07:55:51,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:55:51" (1/1) ... [2021-05-06 07:55:51,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:55:51,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:55:52,046 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound100.i[958,971] [2021-05-06 07:55:52,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:55:52,100 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:55:52,126 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/divbin_unwindbound100.i[958,971] [2021-05-06 07:55:52,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:55:52,160 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:55:52,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:55:52 WrapperNode [2021-05-06 07:55:52,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:55:52,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:55:52,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:55:52,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:55:52,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:55:52" (1/1) ... [2021-05-06 07:55:52,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:55:52" (1/1) ... [2021-05-06 07:55:52,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:55:52" (1/1) ... [2021-05-06 07:55:52,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:55:52" (1/1) ... [2021-05-06 07:55:52,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:55:52" (1/1) ... [2021-05-06 07:55:52,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:55:52" (1/1) ... [2021-05-06 07:55:52,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:55:52" (1/1) ... [2021-05-06 07:55:52,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:55:52,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:55:52,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:55:52,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:55:52,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:55:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:55:52,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:55:52,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:55:52,357 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:55:52,357 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:55:52,357 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:55:52,357 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:55:52,357 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:55:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:55:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 07:55:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 07:55:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:55:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:55:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:55:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:55:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:55:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:55:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:55:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:55:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:55:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:55:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:55:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:55:52,680 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:55:52,681 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:55:52,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:55:52 BoogieIcfgContainer [2021-05-06 07:55:52,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:55:52,682 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:55:52,682 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:55:52,683 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:55:52,685 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:55:52" (1/1) ... [2021-05-06 07:55:52,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:55:52 BasicIcfg [2021-05-06 07:55:52,725 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:55:52,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:55:52,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:55:52,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:55:52,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:55:51" (1/4) ... [2021-05-06 07:55:52,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@442b6b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:55:52, skipping insertion in model container [2021-05-06 07:55:52,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:55:52" (2/4) ... [2021-05-06 07:55:52,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@442b6b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:55:52, skipping insertion in model container [2021-05-06 07:55:52,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:55:52" (3/4) ... [2021-05-06 07:55:52,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@442b6b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:55:52, skipping insertion in model container [2021-05-06 07:55:52,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:55:52" (4/4) ... [2021-05-06 07:55:52,731 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound100.iJordan [2021-05-06 07:55:52,735 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:55:52,738 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:55:52,766 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:55:52,789 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:55:52,789 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:55:52,789 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:55:52,789 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:55:52,789 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:55:52,790 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:55:52,790 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:55:52,790 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:55:52,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:55:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:55:52,817 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:55:52,817 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:55:52,818 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:55:52,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:55:52,821 INFO L82 PathProgramCache]: Analyzing trace with hash 35225450, now seen corresponding path program 1 times [2021-05-06 07:55:52,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:55:52,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625317032] [2021-05-06 07:55:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:55:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:55:53,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:55:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:55:53,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:55:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:55:53,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 07:55:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:55:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:55:53,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:55:53,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625317032] [2021-05-06 07:55:53,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625317032] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:55:53,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:55:53,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:55:53,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715471781] [2021-05-06 07:55:53,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:55:53,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:55:53,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:55:53,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:55:53,181 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:55:53,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:55:53,287 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 07:55:53,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:55:53,289 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 07:55:53,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:55:53,295 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:55:53,296 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 07:55:53,298 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:55:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 07:55:53,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-06 07:55:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:55:53,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-05-06 07:55:53,332 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2021-05-06 07:55:53,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:55:53,332 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-05-06 07:55:53,332 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:55:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-05-06 07:55:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 07:55:53,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:55:53,335 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:55:53,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:55:53,335 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:55:53,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:55:53,341 INFO L82 PathProgramCache]: Analyzing trace with hash 106385839, now seen corresponding path program 1 times [2021-05-06 07:55:53,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:55:53,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943199409] [2021-05-06 07:55:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:55:53,367 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:55:53,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163638477] [2021-05-06 07:55:53,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:55:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:55:53,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 07:55:53,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:55:53,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:53,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:53,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:53,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:53,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:55:53,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:55:53,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943199409] [2021-05-06 07:55:53,551 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:55:53,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163638477] [2021-05-06 07:55:53,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163638477] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:55:53,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:55:53,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:55:53,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161886109] [2021-05-06 07:55:53,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 07:55:53,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:55:53,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 07:55:53,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:55:53,554 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:55:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:55:53,563 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-05-06 07:55:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 07:55:53,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-05-06 07:55:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:55:53,564 INFO L225 Difference]: With dead ends: 30 [2021-05-06 07:55:53,564 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 07:55:53,565 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:55:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 07:55:53,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 07:55:53,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:55:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-05-06 07:55:53,569 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2021-05-06 07:55:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:55:53,570 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-05-06 07:55:53,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:55:53,570 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-05-06 07:55:53,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 07:55:53,571 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:55:53,571 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:55:53,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:55:53,792 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:55:53,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:55:53,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1662084126, now seen corresponding path program 1 times [2021-05-06 07:55:53,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:55:53,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195564304] [2021-05-06 07:55:53,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:55:53,815 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:55:53,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872268573] [2021-05-06 07:55:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:55:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:55:53,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:55:53,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:55:53,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:53,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:53,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:53,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:53,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:53,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:53,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:53,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:55:53,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:55:53,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195564304] [2021-05-06 07:55:53,998 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:55:53,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872268573] [2021-05-06 07:55:53,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872268573] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:55:53,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:55:53,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:55:53,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904733731] [2021-05-06 07:55:53,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:55:53,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:55:53,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:55:53,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:55:53,999 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:55:54,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:55:54,033 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-05-06 07:55:54,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:55:54,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 07:55:54,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:55:54,034 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:55:54,034 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:55:54,034 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:55:54,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:55:54,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-06 07:55:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:55:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-05-06 07:55:54,037 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2021-05-06 07:55:54,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:55:54,038 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-05-06 07:55:54,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:55:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-05-06 07:55:54,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 07:55:54,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:55:54,039 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:55:54,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:55:54,259 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:55:54,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:55:54,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1663216184, now seen corresponding path program 1 times [2021-05-06 07:55:54,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:55:54,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374682322] [2021-05-06 07:55:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:55:54,274 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:55:54,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778156089] [2021-05-06 07:55:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:55:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:55:54,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:55:54,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:55:54,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:54,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:54,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:54,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:54,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:55:54,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:55:54,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374682322] [2021-05-06 07:55:54,509 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:55:54,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778156089] [2021-05-06 07:55:54,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778156089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:55:54,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:55:54,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:55:54,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417566193] [2021-05-06 07:55:54,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:55:54,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:55:54,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:55:54,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:55:54,514 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:55:54,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:55:54,653 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-05-06 07:55:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:55:54,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 07:55:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:55:54,656 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:55:54,657 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 07:55:54,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:55:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 07:55:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-06 07:55:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:55:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-05-06 07:55:54,675 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 26 [2021-05-06 07:55:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:55:54,675 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-05-06 07:55:54,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:55:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-05-06 07:55:54,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 07:55:54,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:55:54,676 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:55:54,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:55:54,901 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:55:54,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:55:54,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1664227005, now seen corresponding path program 1 times [2021-05-06 07:55:54,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:55:54,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699939254] [2021-05-06 07:55:54,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:55:54,920 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:55:54,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225273055] [2021-05-06 07:55:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:55:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:55:54,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:55:54,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:55:54,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:54,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:54,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:55:55,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:55:55,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699939254] [2021-05-06 07:55:55,046 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:55:55,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225273055] [2021-05-06 07:55:55,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225273055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:55:55,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:55:55,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 07:55:55,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937640107] [2021-05-06 07:55:55,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:55:55,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:55:55,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:55:55,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:55:55,047 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:55:55,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:55:55,083 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-05-06 07:55:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:55:55,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 07:55:55,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:55:55,084 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:55:55,084 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 07:55:55,084 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:55:55,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 07:55:55,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-06 07:55:55,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:55:55,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 07:55:55,087 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 28 [2021-05-06 07:55:55,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:55:55,087 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 07:55:55,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:55:55,087 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 07:55:55,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 07:55:55,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:55:55,088 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:55:55,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:55:55,311 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:55:55,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:55:55,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1687306486, now seen corresponding path program 1 times [2021-05-06 07:55:55,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:55:55,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229806977] [2021-05-06 07:55:55,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:55:55,321 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:55:55,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288354814] [2021-05-06 07:55:55,322 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 07:55:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:55:55,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:55:55,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:55:55,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:55:55,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:55:55,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229806977] [2021-05-06 07:55:55,447 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:55:55,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288354814] [2021-05-06 07:55:55,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288354814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:55:55,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:55:55,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:55:55,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897356171] [2021-05-06 07:55:55,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:55:55,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:55:55,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:55:55,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:55:55,449 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:55:55,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:55:55,479 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-06 07:55:55,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:55:55,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 07:55:55,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:55:55,480 INFO L225 Difference]: With dead ends: 57 [2021-05-06 07:55:55,480 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 07:55:55,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:55:55,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 07:55:55,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-05-06 07:55:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:55:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-06 07:55:55,484 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 29 [2021-05-06 07:55:55,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:55:55,484 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-06 07:55:55,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:55:55,484 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-06 07:55:55,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 07:55:55,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:55:55,485 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:55:55,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:55:55,702 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:55:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:55:55,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1686174428, now seen corresponding path program 1 times [2021-05-06 07:55:55,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:55:55,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55052968] [2021-05-06 07:55:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:55:55,712 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:55:55,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111835521] [2021-05-06 07:55:55,712 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 07:55:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:55:55,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 07:55:55,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:55:55,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:55,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:55:56,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:55:56,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55052968] [2021-05-06 07:55:56,005 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:55:56,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111835521] [2021-05-06 07:55:56,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111835521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:55:56,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:55:56,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:55:56,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531099938] [2021-05-06 07:55:56,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:55:56,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:55:56,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:55:56,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:55:56,007 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:55:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:55:58,422 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2021-05-06 07:55:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:55:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-05-06 07:55:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:55:58,423 INFO L225 Difference]: With dead ends: 71 [2021-05-06 07:55:58,423 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 07:55:58,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-06 07:55:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 07:55:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-06 07:55:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 07:55:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-05-06 07:55:58,426 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 29 [2021-05-06 07:55:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:55:58,427 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-05-06 07:55:58,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:55:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-05-06 07:55:58,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 07:55:58,427 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:55:58,427 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:55:58,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:55:58,633 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:55:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:55:58,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1552566600, now seen corresponding path program 1 times [2021-05-06 07:55:58,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:55:58,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997472197] [2021-05-06 07:55:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:55:58,641 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:55:58,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036157459] [2021-05-06 07:55:58,642 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 07:55:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:55:58,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 07:55:58,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:55:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:55:58,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:55:58,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997472197] [2021-05-06 07:55:58,765 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:55:58,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036157459] [2021-05-06 07:55:58,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036157459] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:55:58,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:55:58,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:55:58,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236195204] [2021-05-06 07:55:58,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:55:58,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:55:58,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:55:58,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:55:58,766 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:55:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:55:58,781 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-05-06 07:55:58,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:55:58,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-05-06 07:55:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:55:58,782 INFO L225 Difference]: With dead ends: 49 [2021-05-06 07:55:58,782 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 07:55:58,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:55:58,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 07:55:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 07:55:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:55:58,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-05-06 07:55:58,785 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 35 [2021-05-06 07:55:58,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:55:58,785 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-05-06 07:55:58,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:55:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-05-06 07:55:58,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 07:55:58,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:55:58,786 INFO L523 BasicCegarLoop]: trace histogram [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 07:55:59,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:55:59,005 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:55:59,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:55:59,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1290263155, now seen corresponding path program 1 times [2021-05-06 07:55:59,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:55:59,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8491095] [2021-05-06 07:55:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:55:59,014 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:55:59,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179548353] [2021-05-06 07:55:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:55:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:55:59,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:55:59,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:55:59,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:59,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:59,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:59,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:59,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:59,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:59,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:59,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:59,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:59,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:59,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:59,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:59,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:59,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:55:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:55:59,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:55:59,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8491095] [2021-05-06 07:55:59,213 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:55:59,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179548353] [2021-05-06 07:55:59,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179548353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:55:59,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:55:59,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:55:59,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088967278] [2021-05-06 07:55:59,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:55:59,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:55:59,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:55:59,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:55:59,215 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:55:59,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:55:59,290 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-05-06 07:55:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:55:59,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-05-06 07:55:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:55:59,291 INFO L225 Difference]: With dead ends: 59 [2021-05-06 07:55:59,291 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 07:55:59,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:55:59,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 07:55:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-05-06 07:55:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.205128205128205) internal successors, (47), 40 states have internal predecessors, (47), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:55:59,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-05-06 07:55:59,294 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 38 [2021-05-06 07:55:59,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:55:59,295 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-05-06 07:55:59,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:55:59,295 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-05-06 07:55:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 07:55:59,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:55:59,295 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 07:55:59,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 07:55:59,505 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:55:59,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:55:59,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1291395213, now seen corresponding path program 1 times [2021-05-06 07:55:59,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:55:59,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520400134] [2021-05-06 07:55:59,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:55:59,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:55:59,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516704342] [2021-05-06 07:55:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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