/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/sqrt1-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:53:49,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:53:49,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:53:49,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:53:49,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:53:49,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:53:49,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:53:49,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:53:49,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:53:49,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:53:49,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:53:49,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:53:49,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:53:49,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:53:49,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:53:49,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:53:49,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:53:49,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:53:49,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:53:49,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:53:49,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:53:49,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:53:49,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:53:49,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:53:49,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:53:49,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:53:49,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:53:49,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:53:49,617 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:53:49,633 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:53:49,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:53:49,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:53:49,636 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:53:49,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:53:49,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:53:49,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:53:49,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:53:49,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:53:49,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:53:49,637 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:53:49,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:53:49,638 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:53:49,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:53:49,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:53:49,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:53:49,639 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:53:49,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:53:49,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:53:49,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:53:49,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:53:49,640 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:53:49,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:53:49,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:53:49,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:53:49,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:53:49,995 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:53:49,996 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:53:49,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c [2021-05-06 10:53:50,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cfb746fe/4516a276e2af4af4a21b910e4270da11/FLAGfc5aad104 [2021-05-06 10:53:50,456 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:53:50,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c [2021-05-06 10:53:50,468 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cfb746fe/4516a276e2af4af4a21b910e4270da11/FLAGfc5aad104 [2021-05-06 10:53:50,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cfb746fe/4516a276e2af4af4a21b910e4270da11 [2021-05-06 10:53:50,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:53:50,890 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:53:50,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:53:50,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:53:50,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:53:50,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:53:50" (1/1) ... [2021-05-06 10:53:50,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7593196a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:50, skipping insertion in model container [2021-05-06 10:53:50,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:53:50" (1/1) ... [2021-05-06 10:53:50,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:53:50,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:53:51,029 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/sqrt1-ll_valuebound10.c[520,533] [2021-05-06 10:53:51,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:53:51,046 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:53:51,055 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/sqrt1-ll_valuebound10.c[520,533] [2021-05-06 10:53:51,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:53:51,071 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:53:51,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:51 WrapperNode [2021-05-06 10:53:51,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:53:51,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:53:51,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:53:51,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:53:51,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:51" (1/1) ... [2021-05-06 10:53:51,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:51" (1/1) ... [2021-05-06 10:53:51,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:51" (1/1) ... [2021-05-06 10:53:51,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:51" (1/1) ... [2021-05-06 10:53:51,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:51" (1/1) ... [2021-05-06 10:53:51,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:51" (1/1) ... [2021-05-06 10:53:51,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:51" (1/1) ... [2021-05-06 10:53:51,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:53:51,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:53:51,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:53:51,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:53:51,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:51" (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 10:53:51,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:53:51,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:53:51,223 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:53:51,223 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:53:51,223 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:53:51,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:53:51,224 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:53:51,224 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:53:51,224 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:53:51,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:53:51,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:53:51,225 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:53:51,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:53:51,225 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:53:51,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:53:51,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:53:51,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:53:51,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:53:51,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:53:51,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:53:51,510 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:53:51,510 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:53:51,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:53:51 BoogieIcfgContainer [2021-05-06 10:53:51,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:53:51,512 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:53:51,512 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:53:51,512 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:53:51,514 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:53:51" (1/1) ... [2021-05-06 10:53:51,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:53:51 BasicIcfg [2021-05-06 10:53:51,525 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:53:51,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:53:51,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:53:51,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:53:51,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:53:50" (1/4) ... [2021-05-06 10:53:51,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f1517b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:53:51, skipping insertion in model container [2021-05-06 10:53:51,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:51" (2/4) ... [2021-05-06 10:53:51,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f1517b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:53:51, skipping insertion in model container [2021-05-06 10:53:51,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:53:51" (3/4) ... [2021-05-06 10:53:51,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f1517b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:53:51, skipping insertion in model container [2021-05-06 10:53:51,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:53:51" (4/4) ... [2021-05-06 10:53:51,531 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound10.cJordan [2021-05-06 10:53:51,536 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:53:51,539 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:53:51,552 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:53:51,567 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:53:51,567 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:53:51,567 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:53:51,567 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:53:51,567 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:53:51,567 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:53:51,568 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:53:51,568 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:53:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:53:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:53:51,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:51,596 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 10:53:51,596 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:51,601 INFO L82 PathProgramCache]: Analyzing trace with hash -179702132, now seen corresponding path program 1 times [2021-05-06 10:53:51,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:51,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422061834] [2021-05-06 10:53:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:51,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:53:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:51,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:53:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:51,848 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 10:53:51,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:51,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422061834] [2021-05-06 10:53:51,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422061834] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:51,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:51,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:53:51,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279169481] [2021-05-06 10:53:51,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:53:51,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:51,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:53:51,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:53:51,868 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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 10:53:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:51,959 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-05-06 10:53:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:53:51,961 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 10:53:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:51,967 INFO L225 Difference]: With dead ends: 31 [2021-05-06 10:53:51,967 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:53:51,968 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:53:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:53:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 10:53:51,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:53:51,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-06 10:53:51,995 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-06 10:53:51,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:51,996 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-06 10:53:51,996 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 10:53:51,996 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-06 10:53:51,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:53:51,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:51,997 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 10:53:51,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:53:51,997 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:51,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:51,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1985279762, now seen corresponding path program 1 times [2021-05-06 10:53:51,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:51,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308631952] [2021-05-06 10:53:51,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:52,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:53:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:52,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:53:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:52,150 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 10:53:52,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:52,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308631952] [2021-05-06 10:53:52,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308631952] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:52,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:52,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 10:53:52,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225484502] [2021-05-06 10:53:52,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:52,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:52,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:52,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:52,153 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 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 10:53:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:52,488 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 10:53:52,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:53:52,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 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 17 [2021-05-06 10:53:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:52,489 INFO L225 Difference]: With dead ends: 38 [2021-05-06 10:53:52,489 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 10:53:52,490 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:53:52,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 10:53:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-06 10:53:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:53:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 10:53:52,498 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-06 10:53:52,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:52,499 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 10:53:52,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 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 10:53:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 10:53:52,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:53:52,500 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:52,500 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:52,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 10:53:52,500 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:52,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:52,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1146988413, now seen corresponding path program 1 times [2021-05-06 10:53:52,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:52,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002528672] [2021-05-06 10:53:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:52,518 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:52,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806938371] [2021-05-06 10:53:52,519 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 10:53:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:52,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:53:52,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:52,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:53:52,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:52,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002528672] [2021-05-06 10:53:52,747 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:52,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806938371] [2021-05-06 10:53:52,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806938371] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:52,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:52,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:53:52,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249253778] [2021-05-06 10:53:52,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:53:52,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:52,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:53:52,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:53:52,750 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 10:53:52,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:52,798 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-06 10:53:52,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:53:52,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 22 [2021-05-06 10:53:52,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:52,801 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:53:52,801 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 10:53:52,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 10:53:52,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 10:53:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:53:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-05-06 10:53:52,807 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2021-05-06 10:53:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:52,807 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-05-06 10:53:52,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 10:53:52,808 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-05-06 10:53:52,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 10:53:52,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:52,808 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:53,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 10:53:53,028 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:53,028 INFO L82 PathProgramCache]: Analyzing trace with hash -88951989, now seen corresponding path program 1 times [2021-05-06 10:53:53,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:53,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572297887] [2021-05-06 10:53:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:53,041 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:53,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571995739] [2021-05-06 10:53:53,041 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 10:53:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:53,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:53:53,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:53,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:53:53,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:53,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572297887] [2021-05-06 10:53:53,220 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:53,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571995739] [2021-05-06 10:53:53,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571995739] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:53,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:53,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:53:53,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106708547] [2021-05-06 10:53:53,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:53:53,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:53,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:53:53,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:53:53,222 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:53:53,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:53,276 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-05-06 10:53:53,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:53:53,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 10:53:53,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:53,278 INFO L225 Difference]: With dead ends: 46 [2021-05-06 10:53:53,278 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 10:53:53,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:53,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 10:53:53,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 10:53:53,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:53:53,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-05-06 10:53:53,284 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27 [2021-05-06 10:53:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:53,284 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-05-06 10:53:53,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:53:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-05-06 10:53:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:53:53,285 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:53,285 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:53,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:53,501 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:53,501 INFO L82 PathProgramCache]: Analyzing trace with hash 196845204, now seen corresponding path program 1 times [2021-05-06 10:53:53,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:53,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128904391] [2021-05-06 10:53:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:53,518 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:53,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775520867] [2021-05-06 10:53:53,518 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 10:53:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:53,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:53:53,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:53,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:53:53,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:53,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128904391] [2021-05-06 10:53:53,673 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:53,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775520867] [2021-05-06 10:53:53,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775520867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:53,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:53,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:53:53,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829867076] [2021-05-06 10:53:53,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:53,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:53,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:53,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:53,675 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 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 10:53:53,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:53,737 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-05-06 10:53:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:53,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 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 34 [2021-05-06 10:53:53,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:53,739 INFO L225 Difference]: With dead ends: 55 [2021-05-06 10:53:53,739 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 10:53:53,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:53,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 10:53:53,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-05-06 10:53:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:53:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-05-06 10:53:53,745 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 34 [2021-05-06 10:53:53,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:53,745 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-05-06 10:53:53,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 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 10:53:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-05-06 10:53:53,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 10:53:53,746 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:53,747 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:53,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:53,961 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:53,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:53,961 INFO L82 PathProgramCache]: Analyzing trace with hash -374953577, now seen corresponding path program 2 times [2021-05-06 10:53:53,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:53,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109653845] [2021-05-06 10:53:53,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:53,971 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:53,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513335006] [2021-05-06 10:53:53,971 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 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 10:53:54,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:53:54,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:54,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:53:54,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:54,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 10:53:54,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:54,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109653845] [2021-05-06 10:53:54,198 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:54,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513335006] [2021-05-06 10:53:54,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513335006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:54,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:54,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:53:54,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975965294] [2021-05-06 10:53:54,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:54,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:54,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:54,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:54,200 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 10:53:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:54,283 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-05-06 10:53:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:54,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-06 10:53:54,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:54,285 INFO L225 Difference]: With dead ends: 59 [2021-05-06 10:53:54,285 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 10:53:54,285 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:54,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 10:53:54,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-05-06 10:53:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:53:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-05-06 10:53:54,291 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 39 [2021-05-06 10:53:54,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:54,291 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-05-06 10:53:54,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 10:53:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-05-06 10:53:54,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 10:53:54,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:54,292 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:54,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:54,509 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:54,509 INFO L82 PathProgramCache]: Analyzing trace with hash -786894479, now seen corresponding path program 3 times [2021-05-06 10:53:54,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:54,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639499528] [2021-05-06 10:53:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:54,520 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:54,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989822987] [2021-05-06 10:53:54,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:54,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:53:54,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:54,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:53:54,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:54,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 10:53:54,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:54,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639499528] [2021-05-06 10:53:54,690 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:54,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989822987] [2021-05-06 10:53:54,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989822987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:54,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:54,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:53:54,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477241447] [2021-05-06 10:53:54,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:54,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:54,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:54,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:54,691 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 10:53:54,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:54,760 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-05-06 10:53:54,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:54,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 10:53:54,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:54,762 INFO L225 Difference]: With dead ends: 63 [2021-05-06 10:53:54,762 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 10:53:54,762 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 10:53:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 10:53:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:53:54,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-05-06 10:53:54,768 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 44 [2021-05-06 10:53:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:54,768 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-05-06 10:53:54,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 10:53:54,768 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-05-06 10:53:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 10:53:54,769 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:54,769 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:54,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 10:53:54,984 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:54,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:54,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1256212910, now seen corresponding path program 4 times [2021-05-06 10:53:54,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:54,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278900164] [2021-05-06 10:53:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:55,012 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:55,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864414751] [2021-05-06 10:53:55,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:53:55,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:53:55,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:55,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:53:55,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:55,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 10:53:55,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:55,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278900164] [2021-05-06 10:53:55,256 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:55,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864414751] [2021-05-06 10:53:55,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864414751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:55,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:55,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:53:55,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199008289] [2021-05-06 10:53:55,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:53:55,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:55,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:53:55,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:55,258 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 10:53:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:55,344 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-05-06 10:53:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:53:55,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-06 10:53:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:55,346 INFO L225 Difference]: With dead ends: 72 [2021-05-06 10:53:55,346 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 10:53:55,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 10:53:55,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-05-06 10:53:55,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 10:53:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-05-06 10:53:55,352 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 51 [2021-05-06 10:53:55,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:55,353 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-05-06 10:53:55,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 10:53:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-05-06 10:53:55,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 10:53:55,354 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:55,354 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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 10:53:55,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:55,571 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:55,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:55,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2048057021, now seen corresponding path program 5 times [2021-05-06 10:53:55,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:55,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767664054] [2021-05-06 10:53:55,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:55,578 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:55,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510160161] [2021-05-06 10:53:55,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:53:55,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 10:53:55,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:55,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 10:53:55,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:55,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 10:53:55,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:55,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767664054] [2021-05-06 10:53:55,813 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:55,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510160161] [2021-05-06 10:53:55,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510160161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:55,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:55,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:53:55,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932563867] [2021-05-06 10:53:55,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:53:55,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:55,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:53:55,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:55,814 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 10:53:55,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:55,903 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-05-06 10:53:55,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:53:55,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-06 10:53:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:55,904 INFO L225 Difference]: With dead ends: 76 [2021-05-06 10:53:55,904 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 10:53:55,905 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 10:53:55,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-06 10:53:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.069767441860465) internal successors, (46), 45 states have internal predecessors, (46), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 10:53:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-05-06 10:53:55,910 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 56 [2021-05-06 10:53:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:55,910 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-05-06 10:53:55,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 10:53:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-05-06 10:53:55,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 10:53:55,911 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:55,912 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:56,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:56,117 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:56,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1440613387, now seen corresponding path program 6 times [2021-05-06 10:53:56,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:56,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225813504] [2021-05-06 10:53:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:56,123 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:56,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144206730] [2021-05-06 10:53:56,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:53:56,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 10:53:56,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:56,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 10:53:56,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:56,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 10:53:56,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:56,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225813504] [2021-05-06 10:53:56,435 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:56,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144206730] [2021-05-06 10:53:56,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144206730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:56,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:56,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:53:56,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207989204] [2021-05-06 10:53:56,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:53:56,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:56,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:53:56,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:53:56,436 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 10:53:56,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:56,637 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-05-06 10:53:56,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:53:56,637 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 10:53:56,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:56,638 INFO L225 Difference]: With dead ends: 84 [2021-05-06 10:53:56,638 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 10:53:56,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:53:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 10:53:56,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 10:53:56,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 10:53:56,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-05-06 10:53:56,643 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 61 [2021-05-06 10:53:56,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:56,644 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-05-06 10:53:56,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 10:53:56,644 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-05-06 10:53:56,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 10:53:56,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:56,645 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:56,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:53:56,853 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:56,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:56,854 INFO L82 PathProgramCache]: Analyzing trace with hash 555218388, now seen corresponding path program 7 times [2021-05-06 10:53:56,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:56,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143424928] [2021-05-06 10:53:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:56,859 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:56,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483550987] [2021-05-06 10:53:56,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:53:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:56,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 10:53:56,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:57,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 10:53:57,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:57,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143424928] [2021-05-06 10:53:57,081 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:57,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483550987] [2021-05-06 10:53:57,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483550987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:57,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:57,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:53:57,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294238228] [2021-05-06 10:53:57,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:53:57,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:57,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:53:57,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:57,083 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 10:53:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:57,177 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-05-06 10:53:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:57,178 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2021-05-06 10:53:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:57,179 INFO L225 Difference]: With dead ends: 89 [2021-05-06 10:53:57,179 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 10:53:57,179 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:53:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 10:53:57,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-05-06 10:53:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 53 states have internal predecessors, (54), 22 states have call successors, (22), 14 states have call predecessors, (22), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 10:53:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2021-05-06 10:53:57,184 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 68 [2021-05-06 10:53:57,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:57,185 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2021-05-06 10:53:57,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 10:53:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2021-05-06 10:53:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 10:53:57,186 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:57,186 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:57,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:57,410 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:57,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:57,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1331766697, now seen corresponding path program 8 times [2021-05-06 10:53:57,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:57,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168266462] [2021-05-06 10:53:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:57,418 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:57,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054977570] [2021-05-06 10:53:57,418 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:57,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:53:57,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:57,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 10:53:57,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:57,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-06 10:53:57,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:57,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168266462] [2021-05-06 10:53:57,713 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:57,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054977570] [2021-05-06 10:53:57,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054977570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:57,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:57,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:53:57,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543646791] [2021-05-06 10:53:57,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:53:57,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:57,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:53:57,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:53:57,715 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 10:54:01,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:01,282 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2021-05-06 10:54:01,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 10:54:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 73 [2021-05-06 10:54:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:01,284 INFO L225 Difference]: With dead ends: 93 [2021-05-06 10:54:01,284 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 10:54:01,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:54:01,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 10:54:01,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 10:54:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 56 states have internal predecessors, (57), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 10:54:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-06 10:54:01,289 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 73 [2021-05-06 10:54:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:01,289 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-06 10:54:01,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 10:54:01,290 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-06 10:54:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 10:54:01,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:01,290 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:01,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:01,504 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:01,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:01,505 INFO L82 PathProgramCache]: Analyzing trace with hash -715048783, now seen corresponding path program 9 times [2021-05-06 10:54:01,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:01,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705477865] [2021-05-06 10:54:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:01,512 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:01,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410435356] [2021-05-06 10:54:01,512 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:01,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 10:54:01,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:01,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 10:54:01,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:01,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:01,765 WARN L159 QuantifierPusher]: Ignoring assumption.