/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/ps6-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:41:00,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:41:00,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:41:00,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:41:00,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:41:00,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:41:00,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:41:00,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:41:00,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:41:00,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:41:00,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:41:00,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:41:00,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:41:00,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:41:00,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:41:00,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:41:00,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:41:00,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:41:00,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:41:00,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:41:00,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:41:00,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:41:00,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:41:00,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:41:00,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:41:00,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 10:41:00,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 10:41:00,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 10:41:00,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 10:41:00,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 10:41:00,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 10:41:00,834 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 10:41:00,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 10:41:00,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:41:00,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:41:00,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:41:00,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:41:00,856 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:41:00,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:41:00,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:41:00,859 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:41:00,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:41:00,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:41:00,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:41:00,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:41:00,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:41:00,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:41:00,860 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:41:00,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:41:00,861 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:41:00,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:41:00,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:41:00,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:41:00,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:41:00,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:41:00,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:41:00,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:41:00,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:41:00,862 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:41:00,862 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:41:01,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:41:01,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:41:01,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:41:01,181 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:41:01,182 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:41:01,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound100.c [2021-05-06 10:41:01,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/500302306/0a6e43394e8c4335a8540654953d9f9b/FLAGbd9a9dc5f [2021-05-06 10:41:01,620 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:41:01,620 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound100.c [2021-05-06 10:41:01,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/500302306/0a6e43394e8c4335a8540654953d9f9b/FLAGbd9a9dc5f [2021-05-06 10:41:02,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/500302306/0a6e43394e8c4335a8540654953d9f9b [2021-05-06 10:41:02,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:41:02,044 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:41:02,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:41:02,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:41:02,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:41:02,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:41:02" (1/1) ... [2021-05-06 10:41:02,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f503cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:41:02, skipping insertion in model container [2021-05-06 10:41:02,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:41:02" (1/1) ... [2021-05-06 10:41:02,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:41:02,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:41:02,166 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/ps6-ll_unwindbound100.c[458,471] [2021-05-06 10:41:02,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:41:02,185 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:41:02,195 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/ps6-ll_unwindbound100.c[458,471] [2021-05-06 10:41:02,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:41:02,212 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:41:02,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:41:02 WrapperNode [2021-05-06 10:41:02,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:41:02,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:41:02,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:41:02,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:41:02,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:41:02" (1/1) ... [2021-05-06 10:41:02,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:41:02" (1/1) ... [2021-05-06 10:41:02,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:41:02" (1/1) ... [2021-05-06 10:41:02,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:41:02" (1/1) ... [2021-05-06 10:41:02,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:41:02" (1/1) ... [2021-05-06 10:41:02,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:41:02" (1/1) ... [2021-05-06 10:41:02,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:41:02" (1/1) ... [2021-05-06 10:41:02,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:41:02,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:41:02,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:41:02,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:41:02,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:41:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:41:02,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:41:02,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:41:02,355 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:41:02,355 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:41:02,355 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:41:02,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:41:02,355 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:41:02,355 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:41:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:41:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:41:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:41:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:41:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:41:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:41:02,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:41:02,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:41:02,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:41:02,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:41:02,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:41:02,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:41:02,640 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:41:02,640 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:41:02,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:41:02 BoogieIcfgContainer [2021-05-06 10:41:02,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:41:02,642 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:41:02,642 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:41:02,643 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:41:02,645 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:41:02" (1/1) ... [2021-05-06 10:41:02,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:41:02 BasicIcfg [2021-05-06 10:41:02,678 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:41:02,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:41:02,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:41:02,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:41:02,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:41:02" (1/4) ... [2021-05-06 10:41:02,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ba6f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:41:02, skipping insertion in model container [2021-05-06 10:41:02,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:41:02" (2/4) ... [2021-05-06 10:41:02,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ba6f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:41:02, skipping insertion in model container [2021-05-06 10:41:02,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:41:02" (3/4) ... [2021-05-06 10:41:02,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ba6f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:41:02, skipping insertion in model container [2021-05-06 10:41:02,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:41:02" (4/4) ... [2021-05-06 10:41:02,684 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound100.cJordan [2021-05-06 10:41:02,688 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:41:02,700 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:41:02,714 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:41:02,737 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:41:02,737 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:41:02,737 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:41:02,737 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:41:02,737 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:41:02,737 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:41:02,737 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:41:02,737 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:41:02,752 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 10:41:02,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:41:02,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:41:02,760 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:41:02,761 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:41:02,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:41:02,766 INFO L82 PathProgramCache]: Analyzing trace with hash 843387237, now seen corresponding path program 1 times [2021-05-06 10:41:02,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:41:02,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833873421] [2021-05-06 10:41:02,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:41:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:41:03,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:41:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:41:03,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:41:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:41:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:41:03,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:41:03,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833873421] [2021-05-06 10:41:03,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833873421] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:41:03,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:41:03,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:41:03,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386008925] [2021-05-06 10:41:03,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:41:03,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:41:03,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:41:03,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:41:03,064 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:41:03,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:41:03,182 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-06 10:41:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:41:03,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:41:03,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:41:03,190 INFO L225 Difference]: With dead ends: 30 [2021-05-06 10:41:03,190 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 10:41:03,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:41:03,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 10:41:03,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-06 10:41:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 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 10:41:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:41:03,216 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-06 10:41:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:41:03,216 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:41:03,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:41:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:41:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:41:03,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:41:03,217 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:41:03,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:41:03,218 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:41:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:41:03,218 INFO L82 PathProgramCache]: Analyzing trace with hash 208087835, now seen corresponding path program 1 times [2021-05-06 10:41:03,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:41:03,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349522866] [2021-05-06 10:41:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:41:03,233 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:41:03,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508852098] [2021-05-06 10:41:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:41:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:41:03,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 10:41:03,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:41:03,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:03,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:03,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:03,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:03,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:41:03,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:41:03,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349522866] [2021-05-06 10:41:03,484 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:41:03,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508852098] [2021-05-06 10:41:03,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508852098] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:41:03,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:41:03,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:41:03,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999180137] [2021-05-06 10:41:03,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 10:41:03,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:41:03,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 10:41:03,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:41:03,488 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:41:03,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:41:03,504 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 10:41:03,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 10:41:03,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 10:41:03,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:41:03,506 INFO L225 Difference]: With dead ends: 26 [2021-05-06 10:41:03,506 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:41:03,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:41:03,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:41:03,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 10:41:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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 10:41:03,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 10:41:03,518 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-05-06 10:41:03,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:41:03,518 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 10:41:03,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:41:03,519 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 10:41:03,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:41:03,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:41:03,523 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:41:03,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:41:03,745 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:41:03,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:41:03,745 INFO L82 PathProgramCache]: Analyzing trace with hash 209190102, now seen corresponding path program 1 times [2021-05-06 10:41:03,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:41:03,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994587807] [2021-05-06 10:41:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:41:03,756 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:41:03,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373108527] [2021-05-06 10:41:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:41:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:41:03,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:41:03,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:41:03,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:41:03,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:41:03,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994587807] [2021-05-06 10:41:03,881 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:41:03,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373108527] [2021-05-06 10:41:03,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373108527] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:41:03,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:41:03,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:41:03,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415269818] [2021-05-06 10:41:03,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:41:03,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:41:03,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:41:03,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:41:03,883 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:41:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:41:04,028 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-06 10:41:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:41:04,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 10:41:04,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:41:04,029 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:41:04,029 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 10:41:04,030 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:41:04,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 10:41:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 10:41:04,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 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 10:41:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 10:41:04,035 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-06 10:41:04,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:41:04,036 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 10:41:04,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:41:04,036 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 10:41:04,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 10:41:04,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:41:04,037 INFO L523 BasicCegarLoop]: trace histogram [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 10:41:04,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:41:04,260 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:41:04,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:41:04,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1223799235, now seen corresponding path program 1 times [2021-05-06 10:41:04,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:41:04,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355112157] [2021-05-06 10:41:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:41:04,271 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:41:04,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23595993] [2021-05-06 10:41:04,271 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 10:41:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:41:04,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:41:04,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:41:04,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:04,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:04,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:04,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:04,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:04,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:04,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:04,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:41:04,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:41:04,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355112157] [2021-05-06 10:41:04,455 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:41:04,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23595993] [2021-05-06 10:41:04,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23595993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:41:04,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:41:04,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:41:04,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090482228] [2021-05-06 10:41:04,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:41:04,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:41:04,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:41:04,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:41:04,457 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:41:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:41:04,484 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 10:41:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:41:04,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-06 10:41:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:41:04,486 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:41:04,486 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 10:41:04,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:41:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 10:41:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 10:41:04,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 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 10:41:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 10:41:04,490 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-06 10:41:04,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:41:04,490 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 10:41:04,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:41:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 10:41:04,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 10:41:04,491 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:41:04,491 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] [2021-05-06 10:41:04,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:41:04,705 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:41:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:41:04,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1222696968, now seen corresponding path program 1 times [2021-05-06 10:41:04,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:41:04,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574068591] [2021-05-06 10:41:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:41:04,715 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:41:04,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364652759] [2021-05-06 10:41:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:41:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:41:04,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:41:04,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:41:04,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:41:04,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:41:04,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574068591] [2021-05-06 10:41:04,905 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:41:04,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364652759] [2021-05-06 10:41:04,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364652759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:41:04,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:41:04,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:41:04,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852007928] [2021-05-06 10:41:04,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:41:04,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:41:04,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:41:04,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:41:04,907 INFO L87 Difference]: Start difference. First operand 34 states and 37 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), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:41:04,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:41:04,947 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-06 10:41:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:41:04,948 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), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 10:41:04,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:41:04,949 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:41:04,949 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 10:41:04,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:41:04,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 10:41:04,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 10:41:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:41:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-05-06 10:41:04,954 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2021-05-06 10:41:04,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:41:04,954 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-05-06 10:41:04,954 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), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:41:04,954 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-05-06 10:41:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:41:04,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:41:04,955 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:41:05,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:41:05,179 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:41:05,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:41:05,180 INFO L82 PathProgramCache]: Analyzing trace with hash -688312481, now seen corresponding path program 2 times [2021-05-06 10:41:05,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:41:05,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508648624] [2021-05-06 10:41:05,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:41:05,192 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:41:05,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667430342] [2021-05-06 10:41:05,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:41:05,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:41:05,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:41:05,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 10:41:05,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:41:05,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:05,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:05,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:05,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:05,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:05,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:05,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:05,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:05,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:05,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:05,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:41:05,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:41:05,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508648624] [2021-05-06 10:41:05,363 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:41:05,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667430342] [2021-05-06 10:41:05,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667430342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:41:05,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:41:05,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:41:05,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010979370] [2021-05-06 10:41:05,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:41:05,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:41:05,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:41:05,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:41:05,365 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:41:05,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:41:05,422 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-06 10:41:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:41:05,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-06 10:41:05,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:41:05,424 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:41:05,424 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 10:41:05,425 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:41:05,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 10:41:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-06 10:41:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:41:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 10:41:05,440 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 34 [2021-05-06 10:41:05,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:41:05,441 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 10:41:05,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:41:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 10:41:05,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:41:05,449 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:41:05,449 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:41:05,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 10:41:05,653 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:41:05,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:41:05,653 INFO L82 PathProgramCache]: Analyzing trace with hash -687210214, now seen corresponding path program 2 times [2021-05-06 10:41:05,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:41:05,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749434143] [2021-05-06 10:41:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:41:05,661 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:41:05,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581613995] [2021-05-06 10:41:05,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:41:05,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:41:05,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:41:05,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:41:05,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:41:05,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:41:05,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:41:05,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749434143] [2021-05-06 10:41:05,924 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:41:05,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581613995] [2021-05-06 10:41:05,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581613995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:41:05,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:41:05,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:41:05,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642132007] [2021-05-06 10:41:05,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:41:05,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:41:05,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:41:05,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:41:05,930 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:41:06,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:41:06,024 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-05-06 10:41:06,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:41:06,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-06 10:41:06,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:41:06,026 INFO L225 Difference]: With dead ends: 54 [2021-05-06 10:41:06,026 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 10:41:06,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:41:06,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 10:41:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 10:41:06,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:41:06,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-05-06 10:41:06,031 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 34 [2021-05-06 10:41:06,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:41:06,032 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-05-06 10:41:06,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:41:06,032 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-05-06 10:41:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 10:41:06,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:41:06,033 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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 10:41:06,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:41:06,237 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:41:06,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:41:06,238 INFO L82 PathProgramCache]: Analyzing trace with hash 96926796, now seen corresponding path program 1 times [2021-05-06 10:41:06,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:41:06,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499104338] [2021-05-06 10:41:06,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:41:06,244 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:41:06,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365477737] [2021-05-06 10:41:06,245 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 10:41:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:41:06,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:41:06,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:41:06,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:06,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:06,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:06,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:06,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:06,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:06,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:06,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:06,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:06,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:06,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:41:06,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:41:06,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499104338] [2021-05-06 10:41:06,476 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:41:06,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365477737] [2021-05-06 10:41:06,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365477737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:41:06,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:41:06,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:41:06,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913864651] [2021-05-06 10:41:06,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:41:06,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:41:06,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:41:06,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:41:06,478 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:41:06,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:41:06,531 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-06 10:41:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:41:06,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-06 10:41:06,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:41:06,533 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:41:06,533 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:41:06,533 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:41:06,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:41:06,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 10:41:06,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:41:06,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-06 10:41:06,537 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 37 [2021-05-06 10:41:06,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:41:06,538 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-06 10:41:06,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:41:06,538 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-06 10:41:06,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 10:41:06,538 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:41:06,539 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:41:06,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:41:06,741 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:41:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:41:06,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1133104769, now seen corresponding path program 3 times [2021-05-06 10:41:06,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:41:06,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015043555] [2021-05-06 10:41:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:41:06,748 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:41:06,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796719031] [2021-05-06 10:41:06,749 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:41:08,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:41:08,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:41:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:41:08,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:41:08,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:08,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:08,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 10:41:08,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:41:08,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015043555] [2021-05-06 10:41:08,684 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:41:08,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796719031] [2021-05-06 10:41:08,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796719031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:41:08,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:41:08,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:41:08,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119807251] [2021-05-06 10:41:08,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:41:08,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:41:08,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:41:08,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:41:08,686 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:41:08,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:41:08,824 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-05-06 10:41:08,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:41:08,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2021-05-06 10:41:08,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:41:08,825 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:41:08,825 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 10:41:08,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:41:08,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 10:41:08,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2021-05-06 10:41:08,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 8 states have call successors, (8), 7 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 10:41:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-06 10:41:08,829 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 42 [2021-05-06 10:41:08,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:41:08,829 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-06 10:41:08,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:41:08,829 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-06 10:41:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 10:41:08,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:41:08,830 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:41:09,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:41:09,039 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:41:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:41:09,040 INFO L82 PathProgramCache]: Analyzing trace with hash -678596118, now seen corresponding path program 2 times [2021-05-06 10:41:09,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:41:09,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842617835] [2021-05-06 10:41:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:41:09,060 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:41:09,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215467786] [2021-05-06 10:41:09,060 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 10:41:09,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:41:09,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:41:09,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:41:09,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:41:09,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:41:09,465 WARN L159 QuantifierPusher]: Ignoring assumption.