/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/hard-u_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:07:54,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:07:54,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:07:54,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 09:07:54,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:07:54,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:07:54,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:07:54,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:07:54,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:07:54,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:07:54,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:07:54,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:07:54,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:07:54,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:07:54,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:07:54,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:07:54,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:07:54,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:07:54,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:07:54,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:07:54,520 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:07:54,527 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:07:54,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:07:54,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:07:54,528 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:07:54,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:07:54,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:07:54,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:07:54,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:07:54,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:07:54,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:07:54,529 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:07:54,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:07:54,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:07:54,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:07:54,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:07:54,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:07:54,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:07:54,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:07:54,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:07:54,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:07:54,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:07:54,531 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:07:54,531 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:07:54,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:07:54,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:07:54,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:07:54,790 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:07:54,790 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:07:54,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2021-05-06 09:07:54,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a5cf85c/9a5f44fe3f504c178e3ef8a3b74afded/FLAG00feda212 [2021-05-06 09:07:55,160 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:07:55,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2021-05-06 09:07:55,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a5cf85c/9a5f44fe3f504c178e3ef8a3b74afded/FLAG00feda212 [2021-05-06 09:07:55,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a5cf85c/9a5f44fe3f504c178e3ef8a3b74afded [2021-05-06 09:07:55,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:07:55,594 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:07:55,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:07:55,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:07:55,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:07:55,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:07:55" (1/1) ... [2021-05-06 09:07:55,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c03f9b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:55, skipping insertion in model container [2021-05-06 09:07:55,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:07:55" (1/1) ... [2021-05-06 09:07:55,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:07:55,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:07:55,704 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/hard-u_valuebound20.c[545,558] [2021-05-06 09:07:55,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:07:55,718 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:07:55,725 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/hard-u_valuebound20.c[545,558] [2021-05-06 09:07:55,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:07:55,738 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:07:55,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:55 WrapperNode [2021-05-06 09:07:55,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:07:55,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:07:55,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:07:55,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:07:55,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:55" (1/1) ... [2021-05-06 09:07:55,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:55" (1/1) ... [2021-05-06 09:07:55,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:55" (1/1) ... [2021-05-06 09:07:55,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:55" (1/1) ... [2021-05-06 09:07:55,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:55" (1/1) ... [2021-05-06 09:07:55,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:55" (1/1) ... [2021-05-06 09:07:55,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:55" (1/1) ... [2021-05-06 09:07:55,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:07:55,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:07:55,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:07:55,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:07:55,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:55" (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 09:07:55,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:07:55,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:07:55,865 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:07:55,865 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:07:55,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:07:55,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:07:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:07:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:07:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:07:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:07:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 09:07:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:07:55,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:07:55,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:07:55,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:07:55,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:07:55,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:07:55,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:07:55,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:07:55,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:07:56,117 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:07:56,117 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:07:56,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:07:56 BoogieIcfgContainer [2021-05-06 09:07:56,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:07:56,119 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:07:56,119 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:07:56,119 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:07:56,124 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:07:56" (1/1) ... [2021-05-06 09:07:56,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:07:56 BasicIcfg [2021-05-06 09:07:56,134 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:07:56,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:07:56,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:07:56,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:07:56,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:07:55" (1/4) ... [2021-05-06 09:07:56,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1c2b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:07:56, skipping insertion in model container [2021-05-06 09:07:56,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:07:55" (2/4) ... [2021-05-06 09:07:56,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1c2b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:07:56, skipping insertion in model container [2021-05-06 09:07:56,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:07:56" (3/4) ... [2021-05-06 09:07:56,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1c2b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:07:56, skipping insertion in model container [2021-05-06 09:07:56,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:07:56" (4/4) ... [2021-05-06 09:07:56,146 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound20.cJordan [2021-05-06 09:07:56,150 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:07:56,153 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:07:56,164 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:07:56,182 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:07:56,182 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:07:56,182 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:07:56,182 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:07:56,182 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:07:56,182 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:07:56,183 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:07:56,183 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:07:56,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 09:07:56,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:07:56,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:56,206 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:07:56,206 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:56,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:56,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-06 09:07:56,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:56,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801031051] [2021-05-06 09:07:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:56,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:07:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:56,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:07:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:56,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:07:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:56,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:07:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:07:56,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:56,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801031051] [2021-05-06 09:07:56,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801031051] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:07:56,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:07:56,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:07:56,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115752646] [2021-05-06 09:07:56,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:07:56,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:56,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:07:56,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:07:56,446 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:07:56,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:07:56,568 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 09:07:56,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:07:56,570 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 09:07:56,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:07:56,574 INFO L225 Difference]: With dead ends: 38 [2021-05-06 09:07:56,574 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 09:07:56,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:07:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 09:07:56,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 09:07:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:07:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 09:07:56,603 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 09:07:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:07:56,604 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 09:07:56,604 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:07:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 09:07:56,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:07:56,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:56,606 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:07:56,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:07:56,606 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:56,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:56,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-06 09:07:56,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:56,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078932845] [2021-05-06 09:07:56,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:56,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:07:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:56,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:07:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:56,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:07:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:56,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:07:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:07:56,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:56,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078932845] [2021-05-06 09:07:56,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078932845] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:07:56,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:07:56,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:07:56,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483757993] [2021-05-06 09:07:56,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:07:56,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:56,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:07:56,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:07:56,715 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 09:07:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:07:57,048 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-06 09:07:57,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:07:57,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 09:07:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:07:57,049 INFO L225 Difference]: With dead ends: 44 [2021-05-06 09:07:57,049 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 09:07:57,050 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:07:57,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 09:07:57,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 09:07:57,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:07:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 09:07:57,055 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 09:07:57,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:07:57,056 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 09:07:57,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 09:07:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 09:07:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 09:07:57,056 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:57,057 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 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 09:07:57,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:07:57,057 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:57,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-06 09:07:57,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:57,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3957370] [2021-05-06 09:07:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:57,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:07:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:57,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:07:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:57,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:07:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:57,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:07:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:57,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 09:07:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:07:57,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:57,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3957370] [2021-05-06 09:07:57,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3957370] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:07:57,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:07:57,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:07:57,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904330918] [2021-05-06 09:07:57,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:07:57,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:57,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:07:57,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:07:57,228 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:07:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:07:57,460 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 09:07:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:07:57,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 09:07:57,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:07:57,462 INFO L225 Difference]: With dead ends: 48 [2021-05-06 09:07:57,462 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 09:07:57,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:07:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 09:07:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 09:07:57,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:07:57,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 09:07:57,474 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 09:07:57,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:07:57,474 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 09:07:57,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:07:57,474 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 09:07:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 09:07:57,476 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:07:57,476 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:07:57,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 09:07:57,476 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:07:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:07:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-06 09:07:57,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:07:57,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490808591] [2021-05-06 09:07:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:07:57,500 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:07:57,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785993518] [2021-05-06 09:07:57,500 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 09:07:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:07:57,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 09:07:57,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:07:57,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:57,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:57,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:57,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:57,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:57,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:57,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:57,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:57,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:07:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 09:07:57,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:07:57,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490808591] [2021-05-06 09:07:57,785 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:07:57,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785993518] [2021-05-06 09:07:57,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785993518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:07:57,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:07:57,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:07:57,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485151865] [2021-05-06 09:07:57,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:07:57,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:07:57,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:07:57,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:07:57,786 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 09:08:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:08:00,088 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-05-06 09:08:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:08:00,088 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-06 09:08:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:08:00,089 INFO L225 Difference]: With dead ends: 62 [2021-05-06 09:08:00,089 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 09:08:00,090 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:08:00,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 09:08:00,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-06 09:08:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 09:08:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-05-06 09:08:00,094 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2021-05-06 09:08:00,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:08:00,094 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-05-06 09:08:00,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 09:08:00,094 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-05-06 09:08:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 09:08:00,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:00,095 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:08:00,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:08:00,296 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:00,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:00,297 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-06 09:08:00,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:00,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971533217] [2021-05-06 09:08:00,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:00,303 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:08:00,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811383612] [2021-05-06 09:08:00,304 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 09:08:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:00,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 09:08:00,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:08:00,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:00,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:00,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:00,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:00,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:00,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:00,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:00,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:00,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:00,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:00,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 09:08:00,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:08:00,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971533217] [2021-05-06 09:08:00,579 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:08:00,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811383612] [2021-05-06 09:08:00,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811383612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:08:00,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:08:00,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:08:00,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832426085] [2021-05-06 09:08:00,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:08:00,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:08:00,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:08:00,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:08:00,581 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:08:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:08:01,030 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-05-06 09:08:01,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:08:01,031 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 09:08:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:08:01,032 INFO L225 Difference]: With dead ends: 74 [2021-05-06 09:08:01,032 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 09:08:01,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:08:01,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 09:08:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-06 09:08:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 09:08:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-05-06 09:08:01,039 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 45 [2021-05-06 09:08:01,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:08:01,040 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-05-06 09:08:01,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:08:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-05-06 09:08:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 09:08:01,041 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:01,041 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:08:01,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:08:01,257 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:01,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-06 09:08:01,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:01,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644086063] [2021-05-06 09:08:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:01,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:08:01,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725582829] [2021-05-06 09:08:01,264 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 09:08:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:01,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 09:08:01,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:08:01,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:01,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:01,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:01,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:01,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:01,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:01,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:01,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:01,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:01,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:01,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:01,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:01,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:01,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:01,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 09:08:01,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:08:01,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644086063] [2021-05-06 09:08:01,627 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:08:01,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725582829] [2021-05-06 09:08:01,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725582829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:08:01,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:08:01,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:08:01,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861127498] [2021-05-06 09:08:01,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:08:01,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:08:01,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:08:01,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:08:01,628 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:08:06,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:08:06,173 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-05-06 09:08:06,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:08:06,174 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 09:08:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:08:06,176 INFO L225 Difference]: With dead ends: 91 [2021-05-06 09:08:06,176 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 09:08:06,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:08:06,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 09:08:06,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-06 09:08:06,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 49 states have (on average 1.163265306122449) internal successors, (57), 51 states have internal predecessors, (57), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 09:08:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-05-06 09:08:06,181 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 55 [2021-05-06 09:08:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:08:06,182 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-05-06 09:08:06,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:08:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-05-06 09:08:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 09:08:06,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:06,184 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:08:06,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:08:06,389 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:06,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:06,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1535015126, now seen corresponding path program 1 times [2021-05-06 09:08:06,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:06,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145563521] [2021-05-06 09:08:06,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:06,396 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:08:06,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70046306] [2021-05-06 09:08:06,396 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