/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/bresenham-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:09:08,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:09:08,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:09:08,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:09:08,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:09:08,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:09:08,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:09:08,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:09:08,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:09:08,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:09:08,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:09:08,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:09:08,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:09:08,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:09:08,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:09:08,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:09:08,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:09:08,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:09:08,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:09:08,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:09:08,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:09:08,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:09:08,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:09:08,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:09:08,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:09:08,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:09:08,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:09:08,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:09:08,844 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:09:08,858 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:09:08,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:09:08,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:09:08,860 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:09:08,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:09:08,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:09:08,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:09:08,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:09:08,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:09:08,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:09:08,861 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:09:08,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:09:08,862 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:09:08,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:09:08,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:09:08,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:09:08,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:09:08,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:09:08,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:09:08,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:09:08,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:09:08,863 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:09:08,863 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:09:09,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:09:09,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:09:09,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:09:09,122 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:09:09,123 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:09:09,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2021-05-06 07:09:09,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1a1063a3/36d18e37c863455ea1942e1e74bd0375/FLAG12cab44fb [2021-05-06 07:09:09,527 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:09:09,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2021-05-06 07:09:09,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1a1063a3/36d18e37c863455ea1942e1e74bd0375/FLAG12cab44fb [2021-05-06 07:09:09,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1a1063a3/36d18e37c863455ea1942e1e74bd0375 [2021-05-06 07:09:09,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:09:09,547 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:09:09,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:09:09,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:09:09,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:09:09,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:09:09" (1/1) ... [2021-05-06 07:09:09,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8038493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:09, skipping insertion in model container [2021-05-06 07:09:09,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:09:09" (1/1) ... [2021-05-06 07:09:09,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:09:09,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:09:09,680 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/bresenham-ll_unwindbound5.c[597,610] [2021-05-06 07:09:09,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:09:09,700 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:09:09,707 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/bresenham-ll_unwindbound5.c[597,610] [2021-05-06 07:09:09,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:09:09,751 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:09:09,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:09 WrapperNode [2021-05-06 07:09:09,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:09:09,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:09:09,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:09:09,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:09:09,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:09" (1/1) ... [2021-05-06 07:09:09,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:09" (1/1) ... [2021-05-06 07:09:09,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:09" (1/1) ... [2021-05-06 07:09:09,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:09" (1/1) ... [2021-05-06 07:09:09,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:09" (1/1) ... [2021-05-06 07:09:09,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:09" (1/1) ... [2021-05-06 07:09:09,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:09" (1/1) ... [2021-05-06 07:09:09,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:09:09,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:09:09,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:09:09,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:09:09,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:09:09,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:09:09,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:09:09,851 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:09:09,851 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:09:09,851 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:09:09,851 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:09:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:09:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:09:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:09:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:09:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:09:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:09:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:09:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:09:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:09:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:09:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:09:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:09:09,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:09:09,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:09:10,078 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:09:10,078 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 07:09:10,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:09:10 BoogieIcfgContainer [2021-05-06 07:09:10,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:09:10,079 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:09:10,079 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:09:10,080 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:09:10,081 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:09:10" (1/1) ... [2021-05-06 07:09:10,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:09:10 BasicIcfg [2021-05-06 07:09:10,092 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:09:10,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:09:10,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:09:10,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:09:10,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:09:09" (1/4) ... [2021-05-06 07:09:10,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff2c45c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:09:10, skipping insertion in model container [2021-05-06 07:09:10,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:09" (2/4) ... [2021-05-06 07:09:10,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff2c45c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:09:10, skipping insertion in model container [2021-05-06 07:09:10,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:09:10" (3/4) ... [2021-05-06 07:09:10,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff2c45c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:09:10, skipping insertion in model container [2021-05-06 07:09:10,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:09:10" (4/4) ... [2021-05-06 07:09:10,099 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.cJordan [2021-05-06 07:09:10,103 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:09:10,106 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:09:10,118 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:09:10,139 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:09:10,139 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:09:10,139 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:09:10,140 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:09:10,140 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:09:10,140 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:09:10,140 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:09:10,140 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:09:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:09:10,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 07:09:10,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:10,163 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:10,163 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:10,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:10,167 INFO L82 PathProgramCache]: Analyzing trace with hash -498253564, now seen corresponding path program 1 times [2021-05-06 07:09:10,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:10,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117515370] [2021-05-06 07:09:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:10,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:09:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:10,355 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 07:09:10,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:10,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117515370] [2021-05-06 07:09:10,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117515370] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:09:10,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:09:10,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:09:10,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012777632] [2021-05-06 07:09:10,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:09:10,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:10,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:09:10,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:09:10,368 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:09:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:10,424 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 07:09:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:09:10,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 07:09:10,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:10,431 INFO L225 Difference]: With dead ends: 26 [2021-05-06 07:09:10,431 INFO L226 Difference]: Without dead ends: 21 [2021-05-06 07:09:10,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:09:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-06 07:09:10,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-05-06 07:09:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:09:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-06 07:09:10,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-06 07:09:10,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:10,452 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-06 07:09:10,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:09:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-06 07:09:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 07:09:10,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:10,453 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:10,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:09:10,453 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:10,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:10,454 INFO L82 PathProgramCache]: Analyzing trace with hash -467747580, now seen corresponding path program 1 times [2021-05-06 07:09:10,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:10,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819053207] [2021-05-06 07:09:10,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:10,463 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:10,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890956879] [2021-05-06 07:09:10,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:10,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:09:10,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:10,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:10,676 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 07:09:10,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:10,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819053207] [2021-05-06 07:09:10,677 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:10,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890956879] [2021-05-06 07:09:10,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890956879] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:09:10,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:09:10,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:09:10,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389540597] [2021-05-06 07:09:10,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:09:10,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:10,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:09:10,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:09:10,679 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:09:10,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:10,732 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-05-06 07:09:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:09:10,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 07:09:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:10,734 INFO L225 Difference]: With dead ends: 32 [2021-05-06 07:09:10,734 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 07:09:10,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:09:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 07:09:10,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-06 07:09:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:09:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-06 07:09:10,738 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-05-06 07:09:10,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:10,738 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-06 07:09:10,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:09:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-06 07:09:10,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 07:09:10,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:10,739 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:10,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:09:10,960 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:10,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1909475431, now seen corresponding path program 1 times [2021-05-06 07:09:10,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:10,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980987654] [2021-05-06 07:09:10,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:10,978 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:10,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16239172] [2021-05-06 07:09:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:11,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 07:09:11,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:11,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:09:11,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:11,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980987654] [2021-05-06 07:09:11,190 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:11,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16239172] [2021-05-06 07:09:11,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16239172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:09:11,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:09:11,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:09:11,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807108734] [2021-05-06 07:09:11,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:09:11,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:11,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:09:11,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:09:11,195 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:09:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:11,283 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-05-06 07:09:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:09:11,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-06 07:09:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:11,286 INFO L225 Difference]: With dead ends: 42 [2021-05-06 07:09:11,286 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 07:09:11,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:09:11,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 07:09:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-06 07:09:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:09:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-06 07:09:11,292 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2021-05-06 07:09:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:11,292 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-06 07:09:11,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:09:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-06 07:09:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 07:09:11,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:11,293 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:11,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:11,514 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:11,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:11,515 INFO L82 PathProgramCache]: Analyzing trace with hash -642681530, now seen corresponding path program 1 times [2021-05-06 07:09:11,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:11,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582873212] [2021-05-06 07:09:11,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:11,522 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:11,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578749311] [2021-05-06 07:09:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:11,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 07:09:11,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:11,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:11,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:11,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:09:11,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:11,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582873212] [2021-05-06 07:09:11,700 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:11,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578749311] [2021-05-06 07:09:11,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578749311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:09:11,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:09:11,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:09:11,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479141236] [2021-05-06 07:09:11,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:09:11,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:11,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:09:11,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:09:11,702 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:09:11,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:11,842 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-05-06 07:09:11,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:09:11,842 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-06 07:09:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:11,843 INFO L225 Difference]: With dead ends: 51 [2021-05-06 07:09:11,843 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 07:09:11,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:09:11,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 07:09:11,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-05-06 07:09:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:09:11,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 07:09:11,857 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 22 [2021-05-06 07:09:11,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:11,858 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 07:09:11,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:09:11,858 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 07:09:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:09:11,858 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:11,859 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:12,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:12,059 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:12,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:12,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1519292561, now seen corresponding path program 1 times [2021-05-06 07:09:12,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:12,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682686067] [2021-05-06 07:09:12,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:12,066 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:12,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868836071] [2021-05-06 07:09:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:12,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:09:12,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:12,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:12,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:12,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:12,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:12,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:12,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:12,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:12,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:09:12,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:12,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682686067] [2021-05-06 07:09:12,182 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:12,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868836071] [2021-05-06 07:09:12,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868836071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:09:12,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:09:12,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 07:09:12,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376867218] [2021-05-06 07:09:12,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:09:12,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:12,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:09:12,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:09:12,183 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:09:12,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:12,203 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-05-06 07:09:12,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:09:12,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-05-06 07:09:12,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:12,206 INFO L225 Difference]: With dead ends: 46 [2021-05-06 07:09:12,206 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 07:09:12,206 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:09:12,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 07:09:12,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 07:09:12,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:09:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-06 07:09:12,209 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 23 [2021-05-06 07:09:12,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:12,209 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-06 07:09:12,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:09:12,210 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-06 07:09:12,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 07:09:12,210 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:12,210 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:12,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:12,426 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:12,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:12,427 INFO L82 PathProgramCache]: Analyzing trace with hash -2036751370, now seen corresponding path program 1 times [2021-05-06 07:09:12,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:12,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652330935] [2021-05-06 07:09:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:12,438 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:12,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736711098] [2021-05-06 07:09:12,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:12,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 07:09:12,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:12,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:12,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:12,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:12,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:12,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:12,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:09:12,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:12,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652330935] [2021-05-06 07:09:12,676 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:12,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736711098] [2021-05-06 07:09:12,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736711098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:09:12,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:09:12,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 07:09:12,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824729213] [2021-05-06 07:09:12,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 07:09:12,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:12,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 07:09:12,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:09:12,677 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:09:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:12,873 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-05-06 07:09:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 07:09:12,874 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-05-06 07:09:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:12,876 INFO L225 Difference]: With dead ends: 55 [2021-05-06 07:09:12,876 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 07:09:12,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-06 07:09:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 07:09:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2021-05-06 07:09:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:09:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-06 07:09:12,880 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-05-06 07:09:12,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:12,880 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-06 07:09:12,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:09:12,880 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-06 07:09:12,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 07:09:12,881 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:12,881 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:13,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:09:13,091 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:13,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:13,091 INFO L82 PathProgramCache]: Analyzing trace with hash 398537738, now seen corresponding path program 2 times [2021-05-06 07:09:13,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:13,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099714488] [2021-05-06 07:09:13,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:13,098 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:13,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852456067] [2021-05-06 07:09:13,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:13,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:09:13,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:09:13,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 07:09:13,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:13,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:13,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:13,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:13,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:13,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:13,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:13,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:13,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:13,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:13,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:13,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:09:13,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:13,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099714488] [2021-05-06 07:09:13,407 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:13,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852456067] [2021-05-06 07:09:13,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852456067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:09:13,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:09:13,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 07:09:13,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266031586] [2021-05-06 07:09:13,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 07:09:13,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:13,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 07:09:13,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:09:13,410 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 13 states, 10 states have (on average 2.4) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:09:29,737 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-06 07:09:48,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:48,575 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-05-06 07:09:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 07:09:48,576 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.4) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-05-06 07:09:48,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:48,576 INFO L225 Difference]: With dead ends: 52 [2021-05-06 07:09:48,576 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:09:48,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 711.3ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-06 07:09:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:09:48,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:09:48,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 07:09:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:09:48,577 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-05-06 07:09:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:48,577 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:09:48,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 10 states have (on average 2.4) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:09:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:09:48,577 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:09:48,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:48,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:09:48 BasicIcfg [2021-05-06 07:09:48,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:09:48,785 INFO L168 Benchmark]: Toolchain (without parser) took 39237.29 ms. Allocated memory was 199.2 MB in the beginning and 239.1 MB in the end (delta: 39.8 MB). Free memory was 165.6 MB in the beginning and 99.0 MB in the end (delta: 66.6 MB). Peak memory consumption was 106.4 MB. Max. memory is 8.0 GB. [2021-05-06 07:09:48,785 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 199.2 MB. Free memory is still 182.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:09:48,785 INFO L168 Benchmark]: CACSL2BoogieTranslator took 209.55 ms. Allocated memory is still 199.2 MB. Free memory was 165.4 MB in the beginning and 183.5 MB in the end (delta: -18.0 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:09:48,785 INFO L168 Benchmark]: Boogie Preprocessor took 36.31 ms. Allocated memory is still 199.2 MB. Free memory was 183.5 MB in the beginning and 182.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:09:48,785 INFO L168 Benchmark]: RCFGBuilder took 280.79 ms. Allocated memory is still 199.2 MB. Free memory was 182.0 MB in the beginning and 167.0 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:09:48,785 INFO L168 Benchmark]: IcfgTransformer took 12.83 ms. Allocated memory is still 199.2 MB. Free memory was 167.0 MB in the beginning and 165.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:09:48,785 INFO L168 Benchmark]: TraceAbstraction took 38690.77 ms. Allocated memory was 199.2 MB in the beginning and 239.1 MB in the end (delta: 39.8 MB). Free memory was 165.2 MB in the beginning and 99.0 MB in the end (delta: 66.2 MB). Peak memory consumption was 105.9 MB. Max. memory is 8.0 GB. [2021-05-06 07:09:48,785 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 199.2 MB. Free memory is still 182.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 209.55 ms. Allocated memory is still 199.2 MB. Free memory was 165.4 MB in the beginning and 183.5 MB in the end (delta: -18.0 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.31 ms. Allocated memory is still 199.2 MB. Free memory was 183.5 MB in the beginning and 182.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 280.79 ms. Allocated memory is still 199.2 MB. Free memory was 182.0 MB in the beginning and 167.0 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 12.83 ms. Allocated memory is still 199.2 MB. Free memory was 167.0 MB in the beginning and 165.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 38690.77 ms. Allocated memory was 199.2 MB in the beginning and 239.1 MB in the end (delta: 39.8 MB). Free memory was 165.2 MB in the beginning and 99.0 MB in the end (delta: 66.2 MB). Peak memory consumption was 105.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 38643.7ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 16.8ms, AutomataDifference: 35755.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 138 SDtfs, 82 SDslu, 630 SDs, 0 SdLazy, 780 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 34772.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1147.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=4, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 41.2ms AutomataMinimizationTime, 7 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 64.2ms SsaConstructionTime, 174.0ms SatisfiabilityAnalysisTime, 981.6ms InterpolantComputationTime, 152 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 1035 SizeOfPredicates, 24 NumberOfNonLiveVariables, 842 ConjunctsInSsa, 122 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 20/46 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...